{"id":424,"date":"2026-02-28T08:12:38","date_gmt":"2026-02-28T08:12:38","guid":{"rendered":"https:\/\/heartcareforyou.in\/blog\/variant-angina-definition-clinical-context-and-cardiology-overview\/"},"modified":"2026-02-28T08:12:38","modified_gmt":"2026-02-28T08:12:38","slug":"variant-angina-definition-clinical-context-and-cardiology-overview","status":"publish","type":"post","link":"https:\/\/heartcareforyou.in\/blog\/variant-angina-definition-clinical-context-and-cardiology-overview\/","title":{"rendered":"Variant Angina: Definition, Clinical Context, and Cardiology Overview"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">Variant Angina Introduction (What it is)<\/h2>\n\n\n\n<p>Variant Angina is a clinical condition that causes episodes of chest discomfort from transient coronary artery spasm.<br\/>\nIt is a type of angina (ischemic chest pain syndrome) within the broader category of ischemic heart disease.<br\/>\nIt is commonly encountered in cardiology when evaluating chest pain that occurs at rest and shows dynamic ECG changes.<br\/>\nIt is also discussed in the context of coronary vasomotor disorders and arrhythmia risk.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Why Variant Angina matters in cardiology (Clinical relevance)<\/h2>\n\n\n\n<p>Variant Angina matters because it highlights that myocardial ischemia can occur even without a fixed, flow-limiting coronary stenosis. For learners, it expands the classic \u201cplaque rupture and demand ischemia\u201d framework to include <strong>dynamic coronary vasoconstriction<\/strong> as a cause of ischemia.<\/p>\n\n\n\n<p>Clinically, distinguishing Variant Angina from other acute chest pain syndromes supports clearer diagnostic reasoning and more appropriate downstream testing. An episode can mimic acute coronary syndrome (ACS), including changes on electrocardiogram (ECG) and sometimes biomarker elevation if prolonged ischemia occurs. At the same time, management priorities differ from typical exertional angina because the underlying mechanism is often <strong>spasm<\/strong>, not solely increased oxygen demand across a stable atherosclerotic lesion.<\/p>\n\n\n\n<p>Variant Angina is also relevant to risk stratification. Transient severe ischemia can provoke malignant ventricular arrhythmias in some patients, especially during active spasm. Recognizing the pattern (often rest pain with transient ST-segment elevation that resolves) can help clinicians anticipate complications, select monitoring intensity, and plan preventive therapy in a patient-specific way.<\/p>\n\n\n\n<p>Finally, Variant Angina provides a useful teaching model for coronary physiology: endothelial function, smooth muscle tone, autonomic triggers, and medication effects (notably vasodilators) become central to understanding symptoms and ECG findings.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Classification \/ types \/ variants<\/h2>\n\n\n\n<p>There is no single universally applied staging system for Variant Angina. In practice, clinicians often classify it using closely related categories that describe the <strong>vasomotor mechanism<\/strong> and the <strong>coronary anatomy<\/strong> involved:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u201cVariant Angina\u201d (Prinzmetal angina) vs broader \u201cvasospastic angina\u201d<\/strong><\/li>\n<li>Variant Angina is commonly used to describe rest angina with transient ST-segment elevation due to focal epicardial coronary spasm.<\/li>\n<li>\n<p>Many clinicians use <em>vasospastic angina<\/em> as an umbrella term that includes Variant Angina and other spasm-related ischemic syndromes. Terminology can vary by clinician and case.<\/p>\n<\/li>\n<li>\n<p><strong>Epicardial coronary spasm vs microvascular spasm<\/strong><\/p>\n<\/li>\n<li><strong>Epicardial spasm<\/strong> involves the larger, angiographically visible coronary arteries and is the classic mechanism discussed with Variant Angina.<\/li>\n<li>\n<p><strong>Microvascular spasm<\/strong> involves smaller resistance vessels not directly visualized on routine angiography; it can produce ischemic symptoms and ECG changes but may require specialized testing. This is closely related but not always labeled Variant Angina.<\/p>\n<\/li>\n<li>\n<p><strong>With obstructive coronary artery disease vs without obstructive disease<\/strong><\/p>\n<\/li>\n<li>Some patients have angiographically mild or significant atherosclerosis plus superimposed spasm.<\/li>\n<li>\n<p>Others have no obstructive coronary artery disease on angiography, suggesting spasm as the dominant mechanism.<\/p>\n<\/li>\n<li>\n<p><strong>Focal vs diffuse spasm; single-vessel vs multivessel spasm<\/strong><\/p>\n<\/li>\n<li>These patterns are often described when spasm is demonstrated during angiography or provocative testing and can influence perceived risk and follow-up intensity.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Relevant anatomy &amp; physiology<\/h2>\n\n\n\n<p>Understanding Variant Angina starts with coronary circulation and myocardial oxygen balance:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Coronary arteries and myocardial perfusion<\/strong><\/li>\n<li>The left main coronary artery branches into the left anterior descending (LAD) and left circumflex (LCx) arteries, supplying much of the left ventricle.<\/li>\n<li>The right coronary artery (RCA) commonly supplies the inferior wall and may supply the atrioventricular (AV) node depending on dominance.<\/li>\n<li>\n<p>Most left ventricular perfusion occurs in <strong>diastole<\/strong>; transient narrowing of an epicardial artery can sharply reduce downstream perfusion pressure.<\/p>\n<\/li>\n<li>\n<p><strong>Epicardial arteries vs microcirculation<\/strong><\/p>\n<\/li>\n<li>Large epicardial arteries normally contribute little resistance; they serve as conductance vessels.<\/li>\n<li>\n<p>Resistance is mainly regulated at the arteriolar level; however, intense epicardial spasm can become the dominant site of obstruction, producing abrupt ischemia.<\/p>\n<\/li>\n<li>\n<p><strong>Vascular tone regulation<\/strong><\/p>\n<\/li>\n<li>Endothelial cells modulate tone via vasodilators (for example nitric oxide) and vasoconstrictors.<\/li>\n<li>Vascular smooth muscle responds to autonomic inputs, circulating mediators, local metabolic signals, and intracellular pathways controlling calcium handling and contractility.<\/li>\n<li>\n<p>Coronary vasomotor tone is therefore dynamic; in Variant Angina, regulation becomes biased toward episodic constriction.<\/p>\n<\/li>\n<li>\n<p><strong>Electrical consequences of ischemia<\/strong><\/p>\n<\/li>\n<li>Acute transmural ischemia can produce <strong>ST-segment elevation<\/strong> on ECG, while subendocardial ischemia more often produces ST depression.<\/li>\n<li>Ischemia also alters cellular membrane potentials, which can increase susceptibility to ventricular arrhythmias during active episodes.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Pathophysiology or mechanism<\/h2>\n\n\n\n<p>Variant Angina is driven primarily by <strong>transient coronary artery spasm<\/strong>, which reduces blood flow and causes reversible myocardial ischemia. The spasm can be focal (a short segment constricting markedly) or diffuse, and it can occur in arteries with or without atherosclerotic plaque.<\/p>\n\n\n\n<p>Key mechanistic themes include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Hyperreactive vascular smooth muscle<\/strong><\/li>\n<li>The smooth muscle in the coronary arterial wall can constrict excessively in response to stimuli that would not cause marked narrowing in most people.<\/li>\n<li>\n<p>Cellular mechanisms often discussed include increased sensitivity to vasoconstrictors and altered calcium-dependent contraction pathways. The exact dominant pathway may vary by patient.<\/p>\n<\/li>\n<li>\n<p><strong>Endothelial dysfunction<\/strong><\/p>\n<\/li>\n<li>When endothelial-dependent vasodilation is impaired, the balance shifts toward constriction.<\/li>\n<li>\n<p>This can amplify responses to triggers and reduce the vessel\u2019s ability to \u201cself-correct\u201d with vasodilation during stress.<\/p>\n<\/li>\n<li>\n<p><strong>Autonomic and trigger-related influences<\/strong><\/p>\n<\/li>\n<li>Episodes often occur at rest and may cluster at night or early morning, patterns consistent with autonomic tone changes across the circadian cycle.<\/li>\n<li>\n<p>Recognized precipitants include smoking and exposure to vasoconstrictive substances (for example cocaine or amphetamines). Other triggers (cold exposure, emotional stress, hyperventilation) are described, though individual susceptibility varies.<\/p>\n<\/li>\n<li>\n<p><strong>Ischemia and electrical instability<\/strong><\/p>\n<\/li>\n<li>During spasm, abrupt ischemia can cause chest pain and transient ECG changes.<\/li>\n<li>If ischemia is severe or prolonged, myocardial injury can occur, and ventricular arrhythmias may be triggered in a susceptible substrate.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Clinical presentation or indications<\/h2>\n\n\n\n<p>Typical clinical scenarios for Variant Angina include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Episodes of <strong>chest discomfort at rest<\/strong>, sometimes occurring in the late night or early morning<\/li>\n<li>Symptoms that <strong>respond to vasodilators<\/strong> (commonly nitrates) in many cases<\/li>\n<li><strong>Transient ECG changes during pain<\/strong>, classically ST-segment elevation that resolves when symptoms resolve<\/li>\n<li>Recurrent, stereotyped episodes separated by symptom-free intervals<\/li>\n<li>Chest pain with <strong>minimal exertional component<\/strong>, or exertional symptoms that do not match the severity\/pattern expected from coronary anatomy<\/li>\n<li>Presentation that resembles ACS (including concerning ECG changes), prompting urgent evaluation to rule out myocardial infarction<\/li>\n<li>History of exposure to vasoconstrictive triggers (for example tobacco use or stimulant drugs), though absence of triggers does not exclude the diagnosis<\/li>\n<li>Palpitations, presyncope, or syncope temporally associated with chest discomfort, raising concern for ischemia-related arrhythmia<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Diagnostic evaluation &amp; interpretation<\/h2>\n\n\n\n<p>Evaluation typically aims to (1) document ischemia during episodes and (2) assess for obstructive coronary artery disease, while considering alternative diagnoses. The exact diagnostic pathway varies by protocol and patient factors.<\/p>\n\n\n\n<p><strong>1) History and pattern recognition<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Clinicians focus on timing (rest vs exertion), episodic nature, nocturnal\/early morning clustering, associated symptoms (diaphoresis, palpitations, syncope), and potential triggers.<\/li>\n<li>A key clue is <strong>recurrent rest pain with rapid resolution<\/strong> and dynamic ECG changes.<\/li>\n<\/ul>\n\n\n\n<p><strong>2) Physical examination<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The exam may be normal between episodes.<\/li>\n<li>During pain, signs may reflect sympathetic activation (for example tachycardia) or hemodynamic instability in severe ischemia.<\/li>\n<\/ul>\n\n\n\n<p><strong>3) ECG testing<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>A 12-lead ECG during active pain is central when obtainable.<\/li>\n<li>Classic teaching is <strong>transient ST-segment elevation<\/strong> during spasm with resolution afterward, but other dynamic patterns can occur.<\/li>\n<li>Because episodes can be brief, ambulatory ECG monitoring may be used to capture transient ischemic changes or associated arrhythmias.<\/li>\n<\/ul>\n\n\n\n<p><strong>4) Cardiac biomarkers and ACS rule-out<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Troponin testing is often performed when presentation is acute.<\/li>\n<li>Biomarkers may be normal if ischemia is brief; elevations can occur if ischemia is prolonged or if infarction occurs. Interpretation is clinical-context dependent.<\/li>\n<\/ul>\n\n\n\n<p><strong>5) Imaging and coronary anatomy assessment<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Echocardiography may be used to assess ventricular function and evaluate for regional wall motion abnormalities, especially if symptoms are ongoing or there is concern for myocardial injury.<\/li>\n<li>Coronary angiography (invasive or CT-based in selected settings) may be performed to evaluate for obstructive disease, particularly when presentation suggests ACS or when risk is higher.<\/li>\n<\/ul>\n\n\n\n<p><strong>6) Provocative testing for spasm (specialized)<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>In some centers, spasm can be provoked during angiography using agents such as acetylcholine or ergonovine under controlled conditions with immediate access to reversal therapy and monitoring.<\/li>\n<li>Indications, protocols, and interpretation criteria vary by clinician and case, and such testing is not performed universally.<\/li>\n<\/ul>\n\n\n\n<p><strong>7) Differential diagnosis to keep in view<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Acute myocardial infarction, unstable angina, pericarditis, myocarditis<\/li>\n<li>Gastroesophageal reflux or esophageal spasm<\/li>\n<li>Panic or anxiety-related symptoms (a diagnosis of exclusion in acute chest pain)<\/li>\n<li>Microvascular angina and other ischemia-with-nonobstructive-coronary-arteries (INOCA) phenotypes<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Management overview (General approach)<\/h2>\n\n\n\n<p>Management of Variant Angina is typically aimed at reducing spasm frequency\/severity, preventing ischemic complications, and addressing contributing risk factors. Specific choices and sequencing vary by clinician and patient factors; the overview below is educational and non-prescriptive.<\/p>\n\n\n\n<p><strong>Immediate episode management (conceptual)<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Acute episodes are often treated with <strong>rapid-acting vasodilators<\/strong> in monitored settings, especially when ECG changes suggest significant ischemia.<\/li>\n<li>Because presentations can resemble ACS, clinicians frequently follow chest-pain pathways to ensure myocardial infarction is not missed.<\/li>\n<\/ul>\n\n\n\n<p><strong>Chronic medical therapy (core concepts)<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Calcium channel blockers (CCBs)<\/strong> are commonly used as foundational therapy because they reduce coronary smooth muscle contraction and help prevent spasm.<\/li>\n<li><strong>Nitrates<\/strong> (often longer-acting formulations for prevention) may be used to reduce vasospasm and improve symptoms; tolerance and regimen planning are individualized.<\/li>\n<li>Other vasodilator strategies may be considered in refractory cases depending on local practice and drug availability (varies by clinician and case).<\/li>\n<\/ul>\n\n\n\n<p><strong>Risk factor and trigger modification<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Avoiding or minimizing <strong>vasoconstrictive triggers<\/strong> is a common component of care, including addressing tobacco use and avoiding stimulant drugs.<\/li>\n<li>If atherosclerosis is present, clinicians often address lipid management, blood pressure, and other cardiovascular risk factors as part of overall ischemic heart disease prevention (specific regimens vary).<\/li>\n<\/ul>\n\n\n\n<p><strong>Caution with certain medications<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Some clinicians use caution with <strong>beta-blockers<\/strong>, particularly nonselective agents, because unopposed alpha-adrenergic activity may theoretically worsen spasm in some settings. Decisions are individualized, especially when beta-blockers are indicated for other conditions.<\/li>\n<li>Antiplatelet therapy decisions depend on whether there is coexisting atherosclerotic disease or another indication; practices vary.<\/li>\n<\/ul>\n\n\n\n<p><strong>Interventional and device considerations<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>If significant fixed obstructive coronary disease is present, revascularization (percutaneous coronary intervention or surgery) may be considered based on standard coronary disease indications, while still addressing spasm.<\/li>\n<li>In patients with documented life-threatening ventricular arrhythmias attributed to spasm (for example aborted sudden cardiac arrest), implantable cardioverter-defibrillator (ICD) considerations may arise alongside aggressive spasm suppression. Candidacy depends on clinical context and electrophysiology assessment.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Complications, risks, or limitations<\/h2>\n\n\n\n<p>Potential complications and limitations include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Acute coronary syndrome mimicry<\/strong><\/li>\n<li>\n<p>Variant episodes can resemble ST-elevation myocardial infarction on ECG, creating urgent diagnostic and triage challenges.<\/p>\n<\/li>\n<li>\n<p><strong>Myocardial infarction<\/strong><\/p>\n<\/li>\n<li>\n<p>Prolonged spasm can lead to myocardial necrosis. Risk varies by episode severity, duration, and underlying coronary anatomy.<\/p>\n<\/li>\n<li>\n<p><strong>Arrhythmias<\/strong><\/p>\n<\/li>\n<li>Ventricular tachycardia\/fibrillation can occur during severe ischemia.<\/li>\n<li>\n<p>Bradyarrhythmias or AV block may occur depending on the ischemic territory (for example RCA spasm affecting nodal tissue).<\/p>\n<\/li>\n<li>\n<p><strong>Syncope or sudden cardiac death<\/strong><\/p>\n<\/li>\n<li>\n<p>These are uncommon but clinically important concerns in patients with documented malignant arrhythmias or high-risk features. Individual risk varies.<\/p>\n<\/li>\n<li>\n<p><strong>Medication limitations and adverse effects<\/strong><\/p>\n<\/li>\n<li>Vasodilators can cause hypotension, headache, flushing, or dizziness, which may limit adherence or dosing strategies (details vary).<\/li>\n<li>\n<p>Long-term management may require balancing anti-spasm therapy with other comorbidities.<\/p>\n<\/li>\n<li>\n<p><strong>Diagnostic limitations<\/strong><\/p>\n<\/li>\n<li>Capturing an ECG during symptoms can be difficult because episodes may be brief.<\/li>\n<li>Provocative testing is specialized, not universally available, and carries procedural risk; patient selection is individualized.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Prognosis &amp; follow-up considerations<\/h2>\n\n\n\n<p>Prognosis in Variant Angina is influenced by the frequency and severity of spasm, response to therapy, the presence of coexisting obstructive coronary artery disease, and whether significant arrhythmias have occurred. Many patients experience meaningful symptom improvement with vasodilator-based therapy and trigger mitigation, but recurrences can occur.<\/p>\n\n\n\n<p>Follow-up considerations commonly include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Symptom tracking over time<\/strong><\/li>\n<li>\n<p>Clinicians often reassess episode frequency, triggers, and response to medication adjustments.<\/p>\n<\/li>\n<li>\n<p><strong>Monitoring for ischemic or arrhythmic complications<\/strong><\/p>\n<\/li>\n<li>\n<p>Patients with syncope, documented arrhythmias, or high-risk presentations may undergo closer rhythm evaluation (approach varies).<\/p>\n<\/li>\n<li>\n<p><strong>Risk factor reassessment<\/strong><\/p>\n<\/li>\n<li>\n<p>Ongoing attention to smoking status, substance exposure, and atherosclerotic risk factors is often part of longitudinal care.<\/p>\n<\/li>\n<li>\n<p><strong>Re-evaluation of diagnosis<\/strong><\/p>\n<\/li>\n<li>If symptoms evolve (for example becoming exertional, prolonged, or associated with reduced exercise tolerance), clinicians may revisit alternative or additional diagnoses such as progressive coronary artery disease, microvascular dysfunction, or non-cardiac causes.<\/li>\n<\/ul>\n\n\n\n<p>Because clinical trajectories vary, follow-up intensity and testing strategy typically depend on patient factors, local protocols, and clinician judgment.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Variant Angina Common questions (FAQ)<\/h2>\n\n\n\n<p><strong>Q: What does Variant Angina mean in plain language?<\/strong><br\/>\nIt refers to chest pain caused by a temporary \u201cspasm\u201d or tightening of a coronary artery. The spasm reduces blood flow to part of the heart muscle for a short time. When the spasm relaxes, symptoms and ECG changes often improve.<\/p>\n\n\n\n<p><strong>Q: Is Variant Angina the same thing as Prinzmetal angina?<\/strong><br\/>\nMany clinicians use the terms interchangeably, especially when describing rest angina with transient ST-segment elevation due to epicardial coronary spasm. Some use <em>vasospastic angina<\/em> as a broader category that includes Variant Angina and related vasomotor disorders. Terminology can vary by clinician and case.<\/p>\n\n\n\n<p><strong>Q: How is Variant Angina different from \u201ctypical\u201d exertional angina?<\/strong><br\/>\nTypical stable angina is often linked to fixed atherosclerotic narrowing that limits blood flow during exertion. Variant Angina is more related to transient vessel constriction that can occur at rest. Both reflect myocardial ischemia, but the triggers and management emphasis can differ.<\/p>\n\n\n\n<p><strong>Q: Can Variant Angina cause ST-segment elevation on an ECG?<\/strong><br\/>\nYes. A classic feature is transient ST-segment elevation during an episode, reflecting acute ischemia that can be transmural in distribution. Because ST elevation also occurs with myocardial infarction, clinicians generally evaluate urgently to distinguish causes in real time.<\/p>\n\n\n\n<p><strong>Q: Do people with Variant Angina always have normal coronary arteries?<\/strong><br\/>\nNot necessarily. Some patients have little or no obstructive coronary disease, while others have atherosclerosis plus superimposed spasm. The coexistence of plaque can affect risk assessment and broader preventive strategies.<\/p>\n\n\n\n<p><strong>Q: What tests help confirm the diagnosis?<\/strong><br\/>\nClinicians often rely on the history pattern plus documentation of transient ischemic ECG changes. Coronary imaging may be used to evaluate for obstructive disease, and specialized provocative testing for spasm may be used in select cases at experienced centers. The choice of tests varies by protocol and patient factors.<\/p>\n\n\n\n<p><strong>Q: Is Variant Angina considered dangerous?<\/strong><br\/>\nIt can be benign in some patients when well controlled, but it also has the potential to cause serious ischemia or trigger arrhythmias in certain settings. Risk depends on episode severity, associated arrhythmias, and underlying coronary anatomy. Clinicians individualize monitoring and treatment intensity based on these factors.<\/p>\n\n\n\n<p><strong>Q: What is the general long-term treatment approach?<\/strong><br\/>\nLong-term management typically focuses on preventing spasm with vasodilator therapies such as calcium channel blockers and nitrates, plus addressing triggers and cardiovascular risk factors. Treatment plans differ depending on symptoms, comorbidities, and whether obstructive coronary disease is present. Medication selection and follow-up strategy vary by clinician and case.<\/p>\n\n\n\n<p><strong>Q: Can someone with Variant Angina return to normal activity or work?<\/strong><br\/>\nMany people can resume usual activities once symptoms are controlled and the care team has assessed risk. Decisions about activity are individualized and often consider recent symptoms, arrhythmia history, and overall cardiovascular status. Clinicians may recommend a gradual return plan depending on the context.<\/p>\n\n\n\n<p><strong>Q: What are common next steps after diagnosis?<\/strong><br\/>\nCommon steps include confirming the pattern of symptoms, optimizing anti-spasm therapy, evaluating for coexisting coronary disease, and reviewing potential triggers. Follow-up may include symptom monitoring and, in selected cases, rhythm evaluation. The exact plan varies based on presentation and local practice.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Variant Angina is a clinical condition that causes episodes of chest discomfort from transient coronary artery spasm. It is a type of angina (ischemic chest pain syndrome) within the broader category of ischemic heart disease. It is commonly encountered in cardiology when evaluating chest pain that occurs at rest and shows dynamic ECG changes. It is also discussed in the context of coronary vasomotor disorders and arrhythmia risk.<\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[],"tags":[],"class_list":["post-424","post","type-post","status-publish","format-standard","hentry"],"_links":{"self":[{"href":"https:\/\/heartcareforyou.in\/blog\/wp-json\/wp\/v2\/posts\/424","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/heartcareforyou.in\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/heartcareforyou.in\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/heartcareforyou.in\/blog\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/heartcareforyou.in\/blog\/wp-json\/wp\/v2\/comments?post=424"}],"version-history":[{"count":0,"href":"https:\/\/heartcareforyou.in\/blog\/wp-json\/wp\/v2\/posts\/424\/revisions"}],"wp:attachment":[{"href":"https:\/\/heartcareforyou.in\/blog\/wp-json\/wp\/v2\/media?parent=424"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/heartcareforyou.in\/blog\/wp-json\/wp\/v2\/categories?post=424"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/heartcareforyou.in\/blog\/wp-json\/wp\/v2\/tags?post=424"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}