Amplitude of the electrocardiographic QRS complexes during and after severe pulmonary edema.

There is recent evidence that anasarca peripheral edema, irrespective of its etiology, attenuates ECG QRS potentials. Pulmonary edema (PE) also is thought to cause reduction in the amplitude of QRS complexes. The case reported herein is of a patient with severe PE, hypertension, left ventricular diastolic dysfunction, and no peripheral edema who did not show changes in the QRS complexes with the management of her pulmonary edema. Thus it appears that PE does not attenuate the amplitude of QRS complexes, and alleviation of this condition does not cause augmentation of QRS voltage. This is in contrast to alterations of peripheral edematous states in the setting of congestive heart failure, which result in changes in the QRS amplitude, as shown previously.