Elevated Pulmonary Artery Pressure (Part 5)
Ultrasound imaging was performed in 715 patients. Two-dimensionally targeted M-mode echocardiographic recordings of the LV activity were performed using the parasternal view in a 30° left lateral position. The “leading edge to leading edge” convention was employed for estimates of cardiac dimensions according to standards of the American Society of Echocardiography. “ ” Wall thickness was measured to the nearest 0.1 cm. Left ventricular mass was estimated by a modification of the Penn formula, as proposed by Devereux et al»: LV mass = 1.05 ([LVIDD + IVS + LVPW]3 — [LVIDDJ3) where LIDD = left ventricular internal diastolic dimension (cm), I VS = interventricular septum, and LVPW=diastolic posterior wall. This value was made comparable to anatomic findings by multiplying the LV mass calculation by 0.80 and adding 0.6 g.” buy cipro
Because of the correlation between height and LV mass (LV mass vs height, r=0.3 in our data set), the principal variable used to estimate the degree of LVH was LV mass indexed to height (g/m).
An attempt was made to contact all patients during an outpatient visit, by telephone, or by review of medical records of clinic attendance. When patients were unavailable for follow-up by these procedures, the records of the Illinois Department of Health were searched for death certificates. Finally, the database provided by the National Death Index was searched for all members of the original cohort.