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Related Experiment Videos

Marked PR interval prolongation simulating ST-segment elevation during exercise testing. A case report

A Alperovich1, A Van Tosh, N Lanes

  • 1Department of Medicine, Beth Israel Medical Center, New York, NY 10003, USA.

Journal of Electrocardiology
|April 1, 1995
PubMed
Summary
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Exercise stress testing can show apparent ST elevation due to prolonged PR intervals, mimicking coronary artery disease. This ECG finding may be explained by PR prolongation, not ischemia, in some patients.

Area of Science:

  • Cardiology
  • Clinical Electrocardiography

Background:

  • ST-segment elevation on exercise stress testing typically suggests significant proximal coronary artery disease.
  • Accurate interpretation of exercise electrocardiography (ECG) is crucial for diagnosing cardiac conditions.

Observation:

  • A patient presented with exercise-induced ST-segment elevation in inferolateral leads during stress testing.
  • Noninvasive imaging studies did not reveal myocardial ischemia or other common causes for the observed ECG changes.

Findings:

  • Detailed ECG analysis revealed that the apparent ST elevation was caused by marked PR interval prolongation.
  • The prolonged PR interval led to the P wave overlapping the J-point of the QRS-ST segment complex.

Implications:

Related Experiment Videos

  • Marked PR interval prolongation during exercise can mimic ST-segment elevation on ECG.
  • Clinicians should consider PR prolongation as a potential cause of apparent ST elevation in patients with negative cardiac evaluations.