Related Experiment Video

Updated: Aug 18, 2026

Oxygenation-sensitive Cardiac MRI with Vasoactive Breathing Maneuvers for the Non-invasive Assessment of Coronary Microvascular Dysfunction
08:35

Oxygenation-sensitive Cardiac MRI with Vasoactive Breathing Maneuvers for the Non-invasive Assessment of Coronary Microvascular Dysfunction

Published on: August 17, 2022

Myocardial oxygen consumption index in patients with coronary artery disease

Arash Arya1, Majid Maleki, Fereydoon Noohi

  • 1Department of Cardiology, Rajaie Cardiovascular Medical Center, Mellat Park, Vali-Asr Avenue, Tehran 19969-11151, Iran. arya@rhc.ac.ir

Asian Cardiovascular & Thoracic Annals
|March 29, 2005
PubMed

Insights

Hospital-based exercise programs significantly enhance functional capacity and reduce myocardial oxygen demand in men with coronary artery disease compared to home-based programs. This cardiac rehabilitation approach offers superior benefits for patient recovery.

Area of Science:

  • Cardiology
  • Exercise Physiology
  • Rehabilitation Medicine

Background:

  • Coronary artery disease (CAD) poses a significant health burden, necessitating effective rehabilitation strategies.
  • Exercise training is a cornerstone of cardiac rehabilitation, aiming to improve cardiovascular function and patient outcomes.
  • Comparing supervised hospital-based versus unsupervised home-based exercise programs is crucial for optimizing CAD management.

Purpose of the Study:

  • To compare the efficacy of hospital-based versus home-based exercise programs in men with coronary artery disease.
  • To evaluate the impact of these programs on functional capacity and myocardial oxygen consumption.
  • To determine the optimal setting for exercise interventions in cardiac rehabilitation.

Main Methods:

  • Randomized controlled trial involving 136 men with coronary artery disease.
  • Assignment to either a hospital-based or home-based exercise program (3 sessions/week) for 3 months.
  • Assessment of functional capacity using treadmill tests (modified Naughton protocol) and measurement of heart rate-blood pressure product.

Main Results:

  • Significant improvements in maximum workload achieved in the hospital-based group (+65%) compared to the home-based group (+17%) (p=0.0001).
  • Reduced resting heart rate-blood pressure product (myocardial oxygen consumption index) in the hospital-based group (-19%) versus no change in the home-based group (p=0.0001).
  • Greater reductions in heart rate-blood pressure product during exercise in the hospital-based group compared to the home-based group (p=0.0001).

Conclusions:

  • Hospital-based exercise training is superior to home-based programs for improving functional capacity in CAD patients.
  • Supervised exercise in a hospital setting effectively reduces myocardial oxygen consumption at rest and during exertion.
  • These findings support the implementation of hospital-based cardiac rehabilitation programs for enhanced patient outcomes.

More Related Videos

Surgical Placement of Catheters for Long-term Cardiovascular Exercise Testing in Swine12:37

Surgical Placement of Catheters for Long-term Cardiovascular Exercise Testing in Swine

Published on: February 9, 2016

Related Concept Videos

Coronary Artery Disease III: Clinical Manifestations01:30

Coronary Artery Disease III: Clinical Manifestations

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...
Pathophysiology of Cardiac Performance01:29

Pathophysiology of Cardiac Performance

Typical heart performance is influenced by heart rate, rhythm, myocardial contraction, and metabolism or blood flow. The cardiac muscle exhibits distinct electrophysiological features, including pacemaker activity and calcium channel control, which play a vital role in the heart's response to various drugs. The autonomic nervous system, comprising the sympathetic and parasympathetic branches, regulates heart rate. Sympathetic activation increases heart rate, while parasympathetic activation...
Coronary Artery Disease I: Introduction01:30

Coronary Artery Disease I: Introduction

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...
Acute Coronary Syndrome III: Diagnostic Studies01:30

Acute Coronary Syndrome III: Diagnostic Studies

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...
Coronary Artery Disease II: Pathophysiology01:26

Coronary Artery Disease II: Pathophysiology

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...
Cardiac Output and Stroke Volume01:11

Cardiac Output and Stroke Volume

Cardiac output (CO) is an integral aspect of human physiology, reflecting the heart's efficiency and responsiveness to the body's needs. It represents the volume of blood that the left or right ventricle ejects into the aorta or pulmonary trunk each minute. The CO is calculated by multiplying the heart rate (HR)—the number of heartbeats per minute—by the stroke volume (SV)—the amount of blood pumped out with each heartbeat.
In an average resting adult male, the typical cardiac output averages...