Day-to-day variability of electrocardiographic diagnosis of left ventricular hypertrophy in hypertensive patients. Influence of electrode placement.

Objective: Although electrocardiography (ECG) is recommended in all subjects with hypertension, no information is available on the influence exerted by random changes in the placement of electrodes on the day-to-day variability of ECG criteria for diagnosis of left ventricular hypertrophy (LVH).

Methods: In a multicentre, randomized study, two standard 12-lead ECG were recorded, 24 h apart, from 276 consecutive hypertensive patients (mean age 65 +/- 12 years, 49.6% men).

Regression of left ventricular hypertrophy and cardiovascular risk changes in hypertensive patients.

Hypertensive left ventricular hypertrophy (LVH) may be detected in about one third of people with hypertension. When an individual with elevated blood pressure develops LVH, the risk of adverse cardiovascular events in the ensuing years almost doubles even in the absence of symptoms. Because of this high added risk, hypertension and other modifiable risk factors should be managed aggressively with lifestyle measures and drugs.

Improved cardiovascular risk stratification by a simple ECG index in hypertension.

Background: We determined the prognostic value of the Cornell/strain [C/S] index, a simple electrocardiographic (ECG) index for left ventricular hypertrophy (LVH) defined by the presence of either a classic strain pattern or a Cornell voltage (sum of R in aVL + S in V(3)) >2.0 mV in women or 2.4 mV in men, or both.