A study of the spatial vectorcardiogram of the ventricular gradient.

The spatial vectorcardiogram and mean spatial ventricular gradient in normal pregnant women.

The spatial vectorcardiogram and the spatial ventricular gradient of normal subjects in the last trimester of pregnancy and in some of the same subjects following delivery have been studied. It was found that the vectorcardiograms could be divided into two groups on the basis of the form of the QRS sfi-loops, as has been previously reported for other normal subjects. In some instances records t...

Role of the vectorcardiogram-derived spatial QRS-T angle and ventricular gradient in diagnosing left ventricular hypertrophy

اندازه گیری فشار شریان ریوی توسط داپلر و مقایسه آن با روش کاتتریسم

Pulmonary artery pressure can be estimated from right ventricular-right atrial pressure gradient in patients with tricuspid regurgitation. The most common approach is to estimate pulmonary artery systolic pressure from right ventricular pressure (assuming no pulmonic stenosis) determined as the sum of the right ventricular-right atrial pressure gradient and either an assumed or clinically deter...

The vectorcardiogram in mitral valve disease.

The Frank system vectorcardiogram has been studied in 61 patients with severe mitral valve disease to determine the value of the vectorcardiogram in the recognition of the relative degree of left and right ventricular hypertrophy in this situation. The appearance of the usual evidence of right ventricular hypertrophy is delayed in mitral valve disease by the vertical electrical position of the ...

Survey of role of spatial factors on distribution- dispersion of maximums perceptible water in atmosphere of Iran

All the water vapor of atmosphere is contained in a column of the atmosphere that is capable of precipitation and it is from the ground to the final of water vapor called perceptible water. This element influenced by topography and height. The purpose of this study is survey about impact of local and spatial factors on distribution of perceptible water maximums in Iran.For this reason, pressure...