Cardiac measurements in hypertension: Echocardiogram, electrocardiogram and X-ray comparison

Development of left ventricular hypertrophy in young spontaneously hypertensive rats after peripheral sympathectomy.

“…Furthermore, it has recently been shown that electrocardiographic evidence for left ventricular hypertrophy in hypertensive patients does not correlate well with the degree of pressure elevation. 29 The renin-angiotensin system has been implicated as an independent cause of myocardial hypertrophy in the SH rat." Sen et al" treated SH rats with hydralazine or amethyldopa in doses that had equivalent antihypertensive efficacy.…”

Acurácia da radiografia de tórax associada a eletrocardiograma no diagnóstico de hipertrofia em hipertensos

“…Since the studies of Eyler et al 21 and of Hoffman and Rigler 22 , the importance of lateral radiography has become evident for evaluation of the left ventricle. Preserved cardiothoracic ratio did not exclude augmented LV posterior wall thickness, which occurred in 42% of patients in a study using Echo as the gold standard in hypertensive patients 15 .…”

“…The addition of oblique views did not improve the accuracy of posteroanterior and lateral projections for detection of enlargement of the left ventricle and left atrium. These results explain the poor accuracy of chest radiograms found by others that used only the cardiothoracic ratio or measures of cardiac enlargement as a whole for detection of left ventricular enlargement 5,[14][15][16][17][18][19][20] . Since the studies of Eyler et al 21 and of Hoffman and Rigler 22 , the importance of lateral radiography has become evident for evaluation of the left ventricle.…”

“…Most of studies using radiographic exam limited to a single view for evaluation of the cardiothoracic ratio, have indicated that chest radiograph and ECG, separately, present very limited value in LVH diagnosis 12,13,[15][16][17][36][37][38] . However, the combination of both could constitute a good method for LVH diagnosis at the primary level of health care, which was demonstrated in this study.…”