[Differences in reference values in 2-dimensional echocardiography in men and women]. / Rozdiel referencných hodnôt v dvojrozmernej echokardiografii u muzov a zien.

A total of 126 voluntary blood donors (90 men, mean age 30 +/- 0.5 yrs, and 36 women, mean age 34 +/- 0.5 yrs) were examined to establish standards for two-dimensional echocardiography. The maximal width of the left ventricle (LV), the thickness of the interventricular septum (IVS) and of the posterior wall (PW) during systole (s) and diastole (d), the systolic dimension of the left atrium (LA) and the diastolic dimension of the aorta (Ao) and right ventricle (RV) were determined. The measurements were performed from the short parasternal axis. Significantly larger dimensions for LV(s), LV(d), IVS(s), IVS(d)(p less than 0.001) and for LA(s) and PW(d) (p less than 0.01) were measured in men as compared to women. No significant intersexual differences were observed in the other parameters studied or in their calculated ratios (LA/Ao, IVS/PW, ejection fraction and fractional shortening LV, IVS, PW). It can be concluded that exact measurements in correlation studies with two-dimensional echocardiography require corresponding parameter values for body surface area.

[Use of 35-lead mapping of the precordium in the evaluation of left ventricular function in patients after myocardial infarct]. / Pouzitie 35-zvodového mapovania prekordia v hodnotení funkcie l'avej komory u pacientov po infarkte myokardu.

The aim of the investigation was to assess the ejection fraction and regional wall dyssynergy from 35-lead precordial or trunk back ECG taken from 18 consecutive patients after anterior and/or posterior myocardial infarction two months after the acute episode. The percentages of Q waves (% Q) and scores of Q and/or QS waves obtained from 35-lead ECG were compared with the ejection fraction and regional wall dyssynergy recorded by 2D echocardiography. A very good correlation (r = 0.82, SEE = 14.4, p = 0.01) was found between Q% and regional wall dyssynergy in patients with anterior myocardial infarction. There was also a good inverse correlation between ejection fraction and Q% (r = -0.71, SEE = 11.2, p = 0.05) in patients with anterior myocardial infarction. In patients with posterior myocardial infarction no significant correlation was observed by 35-precordial-lead ECG.