This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Request Permissions Citing Articles Citing Articles via Google Scholar Google Scholar Articles by DEPASQUALE, N. P. Articles by BURCH, G. E. Search for Related Content PubMed PubMed Citation Articles by DEPASQUALE, N. P. Articles by BURCH, G. E.

(Circulation. 1961;24:94.)
© 1961 American Heart Association, Inc.

---

The Electrocardiogram, Vectorcardiogram, and Ventricular Gradient in the Tetralogy of Fallot

N. P. DEPASQUALE M.D.¹ G. E. BURCH M.D.¹

¹ From the Department of Medicine, Tulane University School of Medicine and the Charity Hospital of Louisiana in New Orleans.

The electrocardiogram, ventricular gradient, and spatial vectorcardiogram were studied in 140 patients with proved tetralogy of Fallot. The patients were separated into three groups according to hemodynamic data.

The salient features of the electrocardiogram in patients of group I consisted of diminutive R waves in leads I and V₆, a deep Q wave and high R wave in lead III, a prominent R wave in lead V₁, which was not wide, and the absence of Q waves in leads I, V₁, and V₆.

The electrocardiogram in patients of group II was similar to that of the patients of group I except for the appearance of more signs of left ventricular electric activity and less clock-wise rotation of the heart.

The electrocardiogram of the patients of group III was similar to that previously described for ventricular septal defect.

Â_QRS, Â_T, , and sVCG reflected the same general trend as the electrocardiograms.

The electrophysiologic data presented support clinical observations indicating that the tetralogy of Fallot includes patients with a wide range of hemodynamic differences.