Abstract
Electrocardiograms of 77 patients with autopsy proven and/or clinically diagnosed (right heart catheterization was performed in all cases) primary pulmonary hypertension were studied. 23 were male and 54 were female and their average age was 31 years. These cases were divided into two groups; survival and terminal, according to prognosis.
The most common electrocardiographic abnormalities as a whole were right axis deviation of ÂQRS (107.6±29.7°) and ÂP (62.1±15.7°), increased amplitude of R in V1 (11.1±6.9mm), increased R/S ratio in V1 (6.2±6.5), dylayed ventricular activation time in V1 (0.04±0.02sec) and deep S in V5 (9.4±5.1mm).
Comparing the data of the two groups, there was a reasonably good separation in ÂQRS (100.5±30.2° to 118.5±16.8° P<0.01), amplitude of R in V5 (15.5±6.2mm to 10.6±4.3mm, P<0.001), amplitude of R in V6 (10.1±4.3mm to 6.8±3.1mm, P<0.001), R/S ratio of V5 (2.3±2.1 to 1.2±0.8, P<0.005) and R/S ratio of V6 (3.9±4.4. to 1.4±1.3, P<0.005). SIQIII, SIQIIITIII and inverted T in II. III. aVF were found more often in terminal than survival cases, and this was statiscally signifiant.
