Temporary is not always benign: similarities and differences between transient ischemic attack and angina
Antonio Carolei1, Francesca Pistoia, Simona Sacco
1Department of Neurology, University of L'Aquila, L'Aquila, Italy.
Mayo Clinic Proceedings
|July 2, 2013
Summary
Transient ischemic attack (TIA) and angina share temporary symptoms without tissue damage. However, unlike stable angina, TIA symptoms may indicate plaque instability and a high risk of future ischemic events.
Area of Science:
- Neurology
- Cardiology
- Vascular Medicine
Background:
- The updated definition of transient ischemic attack (TIA) requires the absence of infarction on neuroimaging.
- Both TIA and angina present with transient symptoms but differ significantly in underlying mechanisms and clinical implications.
- Stroke and myocardial infarction involve tissue necrosis, contrasting with the reversible nature of TIA and angina symptoms.
Purpose of the Study:
- To compare and contrast transient ischemic attack (TIA) and angina in light of the new tissue-based definition of TIA.
- To explore the similarities and differences in pathophysiology, natural history, prognosis, and treatment response between TIA and angina.
- To evaluate the prognostic significance of symptom reversibility in TIA and angina.
Main Methods:
- Comparative analysis of TIA and angina based on current medical literature and definitions.
- Review of pathophysiological mechanisms, clinical presentation, and prognostic factors for both conditions.
- Discussion of the implications of the tissue-based definition of TIA on its comparison with angina.
Main Results:
- While both TIA and angina exhibit transient symptoms without infarction, their underlying pathologies, disease progression, and prognoses diverge considerably.
- The brain and heart differ fundamentally in structure, physiology, and metabolism, influencing the presentation and outcomes of TIA and angina.
- Symptom reversibility, a favorable sign in stable angina, may indicate plaque instability and increased recurrence risk in TIA and unstable angina.
Conclusions:
- The tissue-based definition of TIA highlights critical differences from angina, particularly concerning prognostic implications.
- Reversible symptoms in TIA, similar to unstable angina, are not benign and signal a potential for serious ischemic events.
- Understanding these distinctions is crucial for accurate diagnosis, risk stratification, and appropriate management of patients presenting with transient neurological or cardiac symptoms.
Related Concept Videos
01:26Transient Ischemic Attack l: Introduction
A transient ischemic attack (TIA) is a brief episode of neurological dysfunction caused by a temporary, focal reduction in cerebral blood flow. Although symptoms resemble those of an ischemic stroke, the interruption in perfusion is short-lived and does not cause permanent infarction. TIAs are clinically important because they often serve as early warning events for future stroke.Mechanisms of Transient Cerebral IschemiaTransient cerebral ischemia may arise through several mechanisms. One...
01:27Angina II: Classification
Angina, also known as angina pectoris, is a chest pain resulting from diminished blood flow to the heart muscle and is often a symptom of coronary artery disease. Angina presents several variants with distinctive attributes, etiologies, and therapeutic approaches. The main types of angina include stable, unstable, variant (Prinzmetal's), microvascular, intractable, and silent ischemia.Stable angina is caused by atherosclerosis, which leads to the formation of plaques that narrow the coronary...
01:29Angina III: Clinical Manifestations and Assessment
Angina manifests as chest pain, tightness, or squeezing discomfort typically located behind the breastbone. It can radiate to the neck, jaw, shoulders, and inner aspects of the upper arms, most commonly the left arm. Patients may experience shortness of breath, fatigue, profuse sweating, dizziness, indigestion, heartburn, palpitations, anxiety, and vomiting as accompanying symptoms. This pain often lasts a few minutes and is triggered by physical exertion, emotional stress, heavy meals, or cold...
01:30Acute Coronary Syndrome I: Introduction
Acute Coronary Syndrome (ACS) encompasses a spectrum of heart conditions caused by sudden obstruction of coronary arteries, typically resulting from the rupture of an atherosclerotic plaque and subsequent thrombus (blood clot) formation. This obstruction can lead to partial or complete blockage of blood flow, causing varying degrees of myocardial ischemia or infarction.ACS includes the following clinical entities:Unstable Angina (UA)Non-ST-Elevation Myocardial Infarction (NSTEMI)ST-Elevation...
01:30Angina I: Introduction
Definition and Symptoms: Angina (angina pectoris) is chest pain or discomfort caused by myocardial ischemia, which occurs when the heart muscle receives insufficient oxygen-rich blood. It typically manifests as pressing, squeezing, or crushing sensations in the chest and may radiate to the shoulders, arms, neck, jaw, or back.Primary Cause: In a healthy state, the coronary arteries can dilate (widen) to increase blood flow and meet the increased oxygen demand during physical activity or...
01:19Acute Coronary Syndrome II: Pathophysiology and Clinical Manifestations
The pathophysiology of Acute Coronary Syndrome [ACD] involves several key processes:The main underlying cause of ACD is atherosclerosis, a chronic inflammatory disease characterized by the buildup of lipid-laden plaques within the coronary arteries.As the atherosclerotic plaque grows in the coronary artery, it may become unstable due to the formation of a lipid-rich core and a thin fibrous cap. Inflammatory cells within the plaque, such as macrophages, secrete enzymes that degrade the...