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Related Concept Videos

Regulation of Heart Rates01:31

Regulation of Heart Rates

The regulation of heart rate is a complex process controlled by the autonomic nervous system (ANS), hormonal influences, and intrinsic cardiac mechanisms. The ANS has two main components: the sympathetic nervous system (SNS) and the parasympathetic nervous system (PNS).
The SNS increases heart rate through the release of norepinephrine and epinephrine, which act on beta-1 adrenergic receptors in the heart. This action increases the rate of depolarization in the sinoatrial (SA) node, the heart's...
Exercise and Cardiovascular Response01:20

Exercise and Cardiovascular Response

Exercise significantly impacts cardiovascular response, which is crucial for understanding patient health and designing effective treatment plans.
Light to moderate physical activity initiates a series of interconnected responses in the body. The heart rate modestly increases in anticipation of the workout, followed by widespread vasodilation as oxygen consumption by skeletal muscles increases. This results in decreased peripheral resistance, increased capillary blood flow, and accelerated...
Factors Influencing Heart Rate01:30

Factors Influencing Heart Rate

The heart rate, or pulse rate, is a vital indicator of cardiovascular health. It reflects the number of times the heart beats per minute. Various physiological and environmental factors influence heart rate, increasing or decreasing cardiac output. Understanding these factors is crucial for assessing heart function and identifying potential health issues.
Let us explore the significant factors affecting heart rate, including age, body temperature, posture, acute pain, chemical influences,...
Metabolic States of the Body: Fasting and Starvation01:24

Metabolic States of the Body: Fasting and Starvation

During the initial hours of fasting, the body uses up its glycogen stores as an energy source. Once these glycogen reserves are depleted, the body begins breaking down stored triglycerides and structural proteins. During this stage, glycerol becomes a key substrate for gluconeogenesis, while free fatty acids undergo beta-oxidation to provide energy for tissues, such as skeletal muscle. In the fasting state, the body spares protein breakdown as much as possible to conserve muscle and structural...
Regulation of Food Intake01:30

Regulation of Food Intake

Short-term regulation of food intake primarily involves neural signals from the gastrointestinal (GI) tract, blood nutrient levels, and GI tract hormones. Communication between the gut and brain via vagal nerve fibers plays a significant role in evaluating the contents of the gut. Clinical studies have shown that protein ingestion produces a more prolonged response in these nerve fibers compared to an equivalent amount of glucose. Additionally, the activation of stretch receptors caused by GI...
Cardiomyopathy IV: Restrictive Cardiomyopathy01:29

Cardiomyopathy IV: Restrictive Cardiomyopathy

Restrictive cardiomyopathy (RCM) is a rare heart muscle disease characterized by impaired ventricular filling due to stiffened ventricular walls, leading to significant diastolic dysfunction.EtiologyRestrictive cardiomyopathy can arise from both inherited and acquired diseases, many of which are systemic. It is categorized into four main types: infiltrative, storage, non-infiltrative, and endomyocardial diseases.Infiltrative diseases, such as amyloidosis, lead to RCM by depositing amyloid...

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Related Experiment Video

Updated: Jun 10, 2026

Normothermic Ex Situ Heart Perfusion in Working Mode: Assessment of Cardiac Function and Metabolism
09:10

Normothermic Ex Situ Heart Perfusion in Working Mode: Assessment of Cardiac Function and Metabolism

Published on: January 12, 2019

Caloric restriction and heart function: is there a sensible link?

Xuefeng Han1, Jun Ren

  • 1Department of Physiology, Fourth Military Medical University, Xi'an, China.

Acta Pharmacologica Sinica
|August 24, 2010
PubMed
Summary

Calorie restriction (CR) may slow aging and prevent cardiovascular disease by triggering beneficial cellular adaptations. However, practical challenges and health concerns limit its widespread clinical use for heart health.

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Assessment of the Metabolic Effects of Isocaloric 2:1 Intermittent Fasting in Mice
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Assessment of the Metabolic Effects of Isocaloric 2:1 Intermittent Fasting in Mice

Published on: November 27, 2019

Related Experiment Videos

Last Updated: Jun 10, 2026

Normothermic Ex Situ Heart Perfusion in Working Mode: Assessment of Cardiac Function and Metabolism
09:10

Normothermic Ex Situ Heart Perfusion in Working Mode: Assessment of Cardiac Function and Metabolism

Published on: January 12, 2019

Assessment of the Metabolic Effects of Isocaloric 2:1 Intermittent Fasting in Mice
08:06

Assessment of the Metabolic Effects of Isocaloric 2:1 Intermittent Fasting in Mice

Published on: November 27, 2019

Area of Science:

  • Cardiology
  • Gerontology
  • Metabolic research

Background:

  • Calorie restriction (CR) involves reducing calorie intake without malnutrition.
  • CR demonstrates potential in retarding aging and cardiovascular disease.
  • Mechanisms include reduced reactive oxygen species and inflammation.

Purpose of the Study:

  • To review the cardiac consequences of CR.
  • To discuss CR's safety and efficacy in cardiovascular health management.

Main Methods:

  • Review of existing clinical and experimental evidence.
  • Discussion of biochemical and cellular adaptations.

Main Results:

  • CR shows favorable cardiovascular effects, potentially mediated by redox homeostasis, mitochondrial function, inflammation, apoptosis, and autophagy.
  • CR may retard aging and cardiovascular disease progression.

Conclusions:

  • CR presents potential benefits for cardiovascular health.
  • Applicability issues and health concerns currently hinder CR implementation in healthcare.