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Related Concept Videos

Increased pulse rate01:17

Increased pulse rate

1.4K
Tachycardia is a condition marked by an abnormally fast or irregular heart rate, surpassing the typical resting rate. In adults, tachycardia is characterized by a pulse rate ranging from 100 to 180 beats per minute. The increased heart rate can result in inadequate blood flow to various body parts, ultimately diminishing the oxygen supply to organs and tissues.
Many factors can elevate the risk of developing tachycardia. These include advanced age, a family history of arrhythmias, and an...
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Dysrhythmias III: Characteristics of Dysrhythmias01:29

Dysrhythmias III: Characteristics of Dysrhythmias

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Dysrhythmias, also known as arrhythmias, are irregular heart rhythms that result from abnormal electrical activity in the heart, affecting its ability to circulate blood efficiently. Tachyarrhythmias, a subset of dysrhythmias, are characterized by abnormally fast heart rates exceeding 100 beats per minute. Here are some types of tachyarrhythmias with their distinct ECG features:Sinus Tachycardia:Sinus tachycardia presents a regular heart rhythm with an increased rate of 101-180 beats per...
641
Dysrhythmias II: Classification of Tachyarrhythmias01:28

Dysrhythmias II: Classification of Tachyarrhythmias

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Tachyarrhythmias are a type of dysrhythmia where the heart rate exceeds 100 beats per minute. Here are some common types of tachyarrhythmias:Sinus TachycardiaSinus tachycardia originates from increased impulses from the sinus node, leading to an elevated heart rate. It is often triggered by stress, fever, or exercise.Patients may experience palpitations, a sensation of a racing heart, dizziness, and chest discomfort.Causes and Risk Factors: Common causes include physical exertion, emotional...
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Exercise and Cardiac Output01:17

Exercise and Cardiac Output

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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.
Sustained exercise increases the muscles' oxygen demand, which can be...
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Exercise and Cardiovascular Response01:20

Exercise and Cardiovascular Response

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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...
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Disturbances in Heart Rhythm01:29

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 heart...
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Upper-mantle dynamics revealed by helium isotope variations along the southeast Indian ridge.

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Exercise-induced ventricular tachycardia associated with coronary arteriovenous fistula and correction by transcatheter coil embolization.

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Related Experiment Video

Updated: Mar 17, 2026

A Rapidly Incremented Tethered-Swimming Maximal Protocol for Cardiorespiratory Assessment of Swimmers
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Ventricular Tachycardia in a Marathoner.

N S Cemaletin, N L Coplan, R Y Shimony

    The Physician and Sportsmedicine
    |July 27, 2016
    PubMed
    Summary

    Young marathon runners logging high mileage may seem healthy, but symptoms like palpitations and light-headedness can indicate underlying cardiovascular issues. Diagnostic tests are crucial for accurate assessment.

    Area of Science:

    • Cardiology
    • Sports Medicine
    • Exercise Physiology

    Background:

    • Young marathon runners often exhibit high levels of physical fitness.
    • Intense training regimens, such as running 60 miles per week, are common in this demographic.
    • Apparent physical health can mask underlying medical conditions.

    Purpose of the Study:

    • To investigate the potential for cardiovascular problems in young, high-mileage marathon runners.
    • To highlight the importance of diagnostic testing in seemingly fit athletes.
    • To underscore that physical appearance can be deceiving regarding cardiovascular health.

    Main Methods:

    • Case study review of young marathon runners presenting with specific symptoms.
    • Cardiovascular assessments and diagnostic tests were performed.

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  • Analysis of training logs and medical histories.

    • Main Results:

    • Episodes of palpitations and light-headedness were observed in some runners.
    • Diagnostic tests revealed underlying cardiovascular abnormalities in certain cases.
    • These findings suggest that high mileage does not preclude cardiovascular risks.

    Conclusions:

    • Young marathoners, despite appearing fit, may have undiagnosed cardiovascular conditions.
    • Symptoms like palpitations and light-headedness warrant thorough cardiovascular evaluation.
    • Comprehensive medical testing is essential to accurately assess the health of high-performance athletes.