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Background <p>Excessive prolongation of the PR interval indicates the potential for atrioventricular (AV) asynchrony, resulting in severe impairment of cardiac function.</p> <p>Case presentation.</p> <p>A 72-year-old man presented to the cardiology department with a history of worsening shortness of breath and chest tightness over the past 3&#xa0;years. The electrocardiogram (ECG) showed sinus rhythm with a prolonged PR interval of 400&#xa0;ms. The echocardiogram revealed mild mitral valve regurgitation with mitral E-A fusion during ventricular diastole. The patient received left bundle branch area pacing to shorten the AV conduction time.</p> Conclusion <p>In patients with symptomatic AV block, reflected by an excessively prolonged PR interval, prompt decision-making regarding cardiac pacing therapy can help relieve clinical symptoms and enhance the patient's quality of life.</p>

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Excessively prolonged PR interval in a patient with worsening shortness of breath: a case report

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  • 发表日期：

    2025年2月17日

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  • Yanjuan Zhang,
  • Zhenyang Jiang,
  • Mingfang Li

摘要

Background

Excessive prolongation of the PR interval indicates the potential for atrioventricular (AV) asynchrony, resulting in severe impairment of cardiac function.

Case presentation.

A 72-year-old man presented to the cardiology department with a history of worsening shortness of breath and chest tightness over the past 3 years. The electrocardiogram (ECG) showed sinus rhythm with a prolonged PR interval of 400 ms. The echocardiogram revealed mild mitral valve regurgitation with mitral E-A fusion during ventricular diastole. The patient received left bundle branch area pacing to shorten the AV conduction time.

Conclusion

In patients with symptomatic AV block, reflected by an excessively prolonged PR interval, prompt decision-making regarding cardiac pacing therapy can help relieve clinical symptoms and enhance the patient's quality of life.