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Related Concept Videos

Imaging Studies for Cardiovascular System VI: Calcium -Scoring CT01:25

Imaging Studies for Cardiovascular System VI: Calcium -Scoring CT

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Calcium-Scoring CT ScanA calcium-scoring CT scan, also known as coronary artery calcium (CAC) scan, detects calcium deposits in the coronary arteries. This test assesses the risk of coronary artery disease (CAD), which can lead to cardiovascular events such as angina, heart failure, and sudden cardiac arrest.A calcium-scoring CT scan is generally recommended for individuals at intermediate risk of CAD without symptoms. It includes:Men aged 40-75 and women aged 50-75: Especially those with a...
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Coronary Artery Disease I: Introduction01:30

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Coronary Artery Disease (CAD): An Overview with Scientific InsightsCoronary Artery Disease (CAD), often referred to as C-A-D, is a prevalent blood vessel disorder classified under the broader category of atherosclerosis. Atherosclerosis is a pathological process characterized by the hardening and narrowing of arteries due to the accumulation of atherosclerotic plaques. These plaques are composed of cholesterol, fatty substances, inflammatory cells, calcium, and fibrin, reducing blood flow to...
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Coronary Artery Disease II: Pathophysiology01:26

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Coronary Artery Disease (CAD) originates from a series of events that impair the function of coronary arteries, the blood vessels responsible for delivering oxygen-rich blood to the heart muscle. The pathophysiology of CAD is closely linked to atherosclerosis, a chronic inflammatory and lipid-driven condition affecting the vascular endothelium.1. Endothelial DamageThe process begins with damage to the vascular endothelium, which serves as a protective barrier between the blood and the vessel...
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Coronary Artery Disease III: Clinical Manifestations01:30

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Coronary Artery Disease (CAD) is a primary health risk worldwide, leading to significant morbidity and mortality. The condition arises from the buildup of atherosclerotic plaques within the coronary arteries, resulting in diminished blood supply to the heart muscle.The clinical manifestations of CAD vary widely, from asymptomatic stages to severe, life-threatening conditions. Understanding these manifestations is crucial for early diagnosis and effective management.Angina Pectoris: The Warning...
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Coronary Artery Disease IV: Preventive Measures01:26

Coronary Artery Disease IV: Preventive Measures

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Effective preventive measures for coronary artery disease (CAD) focus on controlling modifiable risk factors, including cholesterol abnormalities and lifestyle changes.Cholesterol ManagementFirst, the Mediterranean diet and the American Heart Association advocate for maintaining low-density lipoprotein (LDL) cholesterol levels below 100 mg/dL, with a more stringent recommendation of below 70 mg/dL for individuals at high risk. LDL cholesterol, often termed "bad cholesterol," can lead to the...
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Acute Coronary Syndrome III: Diagnostic Studies01:30

Acute Coronary Syndrome III: Diagnostic Studies

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Diagnosing acute coronary syndrome or ACS begins with a thorough patient history. Notable symptoms include central, crushing chest pain radiating to the left arm, neck, jaw, or back, along with shortness of breath, sweating (diaphoresis), nausea, vomiting, dizziness, and palpitations.It is crucial to note any history of cardiac illnesses and assess risk factors, including age, gender, smoking, hypertension, diabetes, hyperlipidemia, and a sedentary lifestyle.During physical examination, vital...
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Related Experiment Video

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Establishing a Competing Risk Regression Nomogram Model for Survival Data
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Risk stratification in coronary disease: a contrary viewpoint.

M M Bodenheimer1

  • 1Long Island Jewish Medical Center, New Hyde Park, NY.

Annals of Internal Medicine
|June 1, 1992
PubMed
Summary

Noninvasive stress testing aims to identify patients at high risk for cardiac events but has limitations. Its effectiveness in predicting cardiac death and guiding invasive procedures like bypass surgery remains unproven.

Area of Science:

  • Cardiology
  • Diagnostic Imaging

Background:

  • Noninvasive stress testing is standard for identifying patients at risk of cardiac death and myocardial infarction.
  • Current methods rely on detecting significant coronary stenosis, but have low positive predictive value in exercising populations.
  • Emerging data indicate rapid progression of coronary artery disease (CAD) in minimally obstructed segments contributes to adverse events.

Purpose of the Study:

  • To evaluate the effectiveness of noninvasive stress testing in identifying patients who would benefit from invasive cardiac studies.
  • To assess the role of noninvasive testing as an intermediate step for selecting patients for coronary angiography and potential bypass surgery.

Main Methods:

  • The study reviews current recommendations and data regarding noninvasive stress testing for cardiac risk assessment.

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  • It analyzes the diagnostic limitations, including positive predictive value and the challenge of detecting rapidly progressing disease.
  • The role of catheterization in predicting bypass surgery candidacy is considered.

    • Main Results:

    • Noninvasive stress testing's ability to accurately predict cardiac death and myocardial infarction is limited by low event prevalence in certain patient groups.
    • The detection of physiologically significant coronary stenosis is the primary limitation.
    • Rapid progression of disease in initially minimally obstructed segments poses a challenge for current noninvasive methods.

    Conclusions:

    • Noninvasive stress testing is an attractive but unproven hypothesis as an intermediate step for selecting patients for invasive cardiac studies.
    • Catheterization remains the only modality proven in randomized trials to predict bypass surgery candidacy.
    • Further research is needed to improve the accuracy and utility of noninvasive testing in cardiac risk stratification.