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Related Concept Videos

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...
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...
Regulation of Stroke Volume01:27

Regulation of Stroke Volume

The regulation of stroke volume, which is the amount of blood the heart pumps out during each heartbeat, is critical for maintaining a healthy circulatory system. Stroke volume is influenced by three main factors: preload, contractility, and afterload.
Preload refers to the degree of stretch on the heart before it contracts. It's analogous to the stretching of a rubber band; the more it's stretched, the more forcefully it snaps back. This concept is encapsulated in the Frank-Starling law of the...
Imbalances in Cardiac Output01:26

Imbalances in Cardiac Output

The heart's primary function is to pump blood throughout the body, maintaining a balance between blood sent out (cardiac output) and blood returning (venous return). If this balance is disrupted, it can result in congestive heart failure (CHF), a severe condition where the heart becomes an inefficient pump, leading to inadequate blood circulation.
CHF can occur due to the failure of either side of the heart. Left-side failure leads to pulmonary congestion—the right side continues to send blood...
Cardiac Output II: Effect of Stroke Volume on Cardiac Output01:22

Cardiac Output II: Effect of Stroke Volume on Cardiac Output

Cardiac output (CO), the amount of blood the heart pumps per minute, is a parameter in cardiovascular physiology determined by stroke volume and heart rate. Stroke volume, the amount of blood pushed from one of the ventricles per heartbeat, is influenced by preload, afterload, and contractility.
Preload
Preload refers to the initial elongation of the cardiac myocytes before contraction and is related to the volume of blood filling the heart at the end of diastole, or end-diastolic volume. The...
Heart Failure I: Introduction01:27

Heart Failure I: Introduction

Heart failure refers to a clinical syndrome caused by structural or functional cardiac disorders that prevent the heart from pumping an adequate amount of blood to meet the body's metabolic needs. This condition often arises from myocardial infarction or ischemia, leading to decreased cardiac output, reduced tissue perfusion, impaired gas exchange, fluid volume imbalance, and decreased functional ability.Heart failure can result from disruptions in the mechanisms that regulate cardiac output...

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Updated: May 12, 2026

Myocardial Infarction and Functional Outcome Assessment in Pigs
12:03

Myocardial Infarction and Functional Outcome Assessment in Pigs

Published on: April 25, 2014

Working capacity after myocardial infarction.

J Fabián1, J Ulrich, I Stolz

  • 1Institute for Clinical and Experimental Medicine, Prague, CSSR.

European Heart Journal
|November 1, 1988
PubMed
Summary
This summary is machine-generated.

This study on acute myocardial infarction survivors found rehabilitation improved work capacity. Returning to work yielded better outcomes than retirement, highlighting the importance of post-infarction recovery programs.

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Area of Science:

  • Cardiology
  • Public Health
  • Occupational Medicine

Background:

  • Assessing functional recovery and long-term prognosis in acute myocardial infarction (AMI) survivors is crucial for patient management and public health.
  • Understanding the impact of employment status on recovery post-AMI provides insights into rehabilitation effectiveness.

Purpose of the Study:

  • To evaluate the functional status and prognosis of AMI survivors in specific Czech regions.
  • To determine the influence of rehabilitation programs and return to work on patient outcomes.
  • To analyze long-term mortality and employment status among AMI survivors.

Main Methods:

  • Data collected on functional assessment and prognosis of AMI survivors.
  • Comparison of outcomes between patients who resumed employment and those who did not.
  • Analysis of 10-year mortality rates and employment status (return to work, partial/full retirement).

Main Results:

  • Rehabilitation programs significantly improved working tolerance, performance, and reduced the heart rate/blood pressure index within six months post-AMI.
  • Patients returning to their original jobs demonstrated substantially better outcomes compared to those not seeking re-employment.
  • The 10-year mortality rate among assessed survivors was 52.1%.

Conclusions:

  • Rehabilitation is effective in improving functional capacity and outcomes for acute myocardial infarction survivors.
  • Resuming employment post-MI is associated with more favorable long-term prognosis compared to retirement.
  • A significant portion of survivors return to work or remain in retirement, indicating diverse long-term life adjustments.