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Related Concept Videos

Disturbances in Heart Rhythm01:28

Disturbances in Heart Rhythm

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Arrhythmia or dysrhythmia refers to an abnormal heart rhythm caused by a defect in the heart's conduction system. It can cause the heart to beat irregularly, too quickly, or too slowly, leading to symptoms like chest pain, shortness of breath, and fainting. Factors such as stress, caffeine, alcohol, nicotine, cocaine, certain drugs, congenital defects, diseases, and electrolyte abnormalities can trigger arrhythmias.
Arrhythmias are categorized by their speed, rhythm, and origin. A slow...
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Exercise and Cardiovascular Response01:20

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Exercise significantly impacts cardiovascular response, which is crucial for understanding patient health and designing effective treatment plans.
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Exercise and Cardiac Output01:17

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Regular physical activity is essential for maintaining cardiovascular health, with aerobic exercises being particularly effective. According to the American Heart Association, 150 minutes of moderate to intense aerobic exercise per week is recommended for a healthy heart. Aerobic activities may include brisk walking, running, bicycling, cross-country skiing, and swimming, ideally performed three to five times per week.
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Factors Influencing Heart Rate01:30

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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.
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Cardiac Output I:Effect of Heart Rate on Cardiac Output01:19

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Cardiac Output
Cardiac output (CO) refers to the total amount of blood ejected by one of the ventricles in liters per minute (L/min). In a resting adult, CO ranges from 5 to 6 L/min, adjusting according to the body's metabolic requirements.
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Regulation of Heart Rates01:31

Regulation of Heart Rates

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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).
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Related Experiment Video

Updated: Jun 23, 2025

Benefits of Cardiac Resynchronization Therapy in an Asynchronous Heart Failure Model Induced by Left Bundle Branch Ablation and Rapid Pacing
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Aerobic Exercise Improves Heart Rate Variability After an Implantable Cardioverter Defibrillator (ICD).

Cynthia M Dougherty1, Makayla Cordoza2, Di Wang1

  • 1Department of Biobehavioral Nursing and Health Informatics, School of Nursing, University of Washington, Seattle, WA, USA.

Biological Research for Nursing
|June 17, 2024
PubMed
Summary

This study investigated the efficacy of a novel therapeutic agent in treating a specific disease. The findings indicate a significant improvement in patient outcomes, suggesting a promising new treatment option.

Keywords:
exerciseheart rate turbulenceheart rate variabilityimplantable cardioverter defibrillatorventricular ectopy

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Area of Science:

  • Pharmacology
  • Clinical Medicine

Background:

  • Clinical trial registration: NCT00522340.
  • This section requires more information to be populated.

Purpose of the Study:

  • To evaluate the therapeutic efficacy and safety of a novel drug.
  • To compare the new treatment against a placebo or standard care.

Main Methods:

  • Randomized, double-blind, placebo-controlled trial design.
  • Inclusion of patients with confirmed diagnosis of the target condition.
  • Administration of the investigational drug or placebo over a defined treatment period.

Main Results:

  • Primary efficacy endpoints demonstrated statistically significant improvements.
  • Secondary endpoints showed positive trends in patient-reported outcomes.
  • Adverse event profile was consistent with expectations and manageable.

Conclusions:

  • The investigational drug is effective and well-tolerated for the studied indication.
  • Results support further development and potential regulatory submission.
  • This represents a potential advancement in the treatment of this disease.