ALDEN S. GOOCH, M.D.; VLADIR MARANHÃO, M.D.
During treadmill exercise of a 43-year-old man an electrocardiographic change was noted that simulated a severe ventricular arrhythmia. This was a harmless effect of sinus tachycardia in a subject with left bundle-branch block. The summation of the upright T wave, U wave, and following P wave caused a high, wide reflection that resembled an additional QRS. The gradual evolution of this pattern is illustrated during walking and is further confirmed by carotid sinus massage after the exercise.
GOOCH AS, MARANHÃO V. Exercise-Induced Pseudoarrhythmia. Ann Intern Med. 1971;75:435–436. doi: https://doi.org/10.7326/0003-4819-75-3-435
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Published: Ann Intern Med. 1971;75(3):435-436.
Cardiac Diagnosis and Imaging, Cardiology, Rhythm Disorders and Devices.
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