Key result
Patients with a short P-R interval had significantly lower ST-J and ST segment amplitudes in lead CR5 during and 3 minutes after exercise compared to matched controls.
Why the study?
Does a short P-R interval affect ST segment amplitudes during and after a multiple-stage graded exercise test?
Population
12 patients with a P-R interval of 0.12 sec or less and no delta wave or ST-T changes in the resting ECG…
Comparison
Multiple-stage graded exercise test vs Age- and sex-matched controls with normal P-R…
Design
Case-control
Authors
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Short PR may confound exercise ECG interpretation; leaves open need for adjusted thresholds in prospective studies.
Case-Control (n=24)
Does a short P-R interval affect ST segment amplitudes during and after a multiple-stage graded exercise test?
Patients with a short P-R interval exhibit significantly lower ST-J and ST segment amplitudes during and after exercise, which should be considered when evaluating exercise electrocardiograms to avoid misinterpretation.
Åstrand et al. (1969) conducted a case-control in Short P-R interval (n=24). Short P-R interval vs. Normal P-R interval (age and sex matched controls) was evaluated on ST-J and ST segment amplitudes in lead CR5 during and 3 min after exercise. Patients with a short P-R interval had significantly lower ST-J and ST segment amplitudes in lead CR5 during and 3 minutes after exercise compared to matched controls.
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