ST-Segment Depression in Hyperventilation Indicates a False Positive Exercise Test in Patients with Mitral Valve Prolapse
Figure 1
Electrocardiographic (ECG) recordings from a 48-year old woman with mitral valve prolapse undergoing maximal treadmill test. A. Resting status-standing position-normal breathing: normal ECG, B. Resting status-standing position-hyperventilation: ST-segment depression in leads II, III, aVF (≈ 0.13 mV)/V4, V5, V6 (≈ 0.1 mV), C. Peak exercise-standing position: ST-segment depression in leads II, III, aVF (≈ 0.23 mV)/V4, V5, V6 (≈ 0.16 mV). This was a false positive exercise test since this woman had a normal coronary arteriography.
