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Transthoracic Echocardiography to Assess Post-Resuscitation Left Ventricular Dysfunction After Acute Myocardial Infarction and Cardiac Arrest in Pigs

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Post-exercise left ventricular dysfunction measured after a long-duration cycling event.

Enrique Serrano Ostariz, Marta López Ramón, Daniel Cremades Arroyos

BMC Research Notes

|May 28, 2013

Summary

Prolonged endurance exercise, like the Quebrantahuesos cycling event, reduced systolic and diastolic function in cyclists. Cardiac biomarkers increased, indicating cardiac stress, but factors like age or intensity did not correlate with the functional changes.

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Area of Science:

Cardiology
Sports Medicine
Exercise Physiology

Background:

Extends previous research on prolonged exercise effects.
Investigates impact on cardiac function and biomarkers in cyclists.
Considers age, training status, and exercise parameters.

Purpose of the Study:

Assess effects of prolonged exercise on cardiac function.
Evaluate changes in cardiac biomarkers post-endurance event.
Determine influence of exercise duration, intensity, and dehydration on cardiac function.

Main Methods:

Echocardiography and serum biomarker analysis before and after a 206 km cycling event.
Measured left ventricular dimensions, ejection fraction, and diastolic filling.
Monitored heart rate in a subset of participants to assess exercise intensity.

Main Results:

Significant reduction in left ventricular systolic and diastolic function post-cycling.
Elevated cardiac biomarkers observed after the event.
No correlation found between functional changes and age, training status, race duration, weight loss, or exercise intensity.

Conclusions:

Prolonged cycling exercise impairs left ventricular systolic and diastolic function.
Increased cardiac biomarkers suggest cardiac stress or damage.
Mechanisms underlying these cardiac changes require further investigation.