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  • Title: [Doppler echocardiographic assessment of left atrial and left ventricular function during right bundle branch block].
    Author: Vorob'ev LP, Maev IV, V'iuchnova ES.
    Journal: Kardiologiia; 1992 Jun; 32(6):71-4. PubMed ID: 1405303.
    Abstract:
    Electrocardiographic, echocardiographic and Doppler echocardiographic studies were performed in 44 patients with coronary heart disease and complete right bundle branch block. The patients were found to have an impaired phase pattern of left ventricular systole and diastole as more prolonged length of its isometric relaxation and contraction, lower economic feasibility and efficiency of its contraction, moderate dilation and hypertrophy. Hemodynamic abnormalities in the left heart in these patients are closely correlate with the changes in the phase pattern of right ventricular systole and they turn out to be so greater as the degree of its hypertrophy is. In complete right bundle branch block, left ventricular pump dysfunction leads to decreased cardiac output and cardiac index, increased total peripheral vascular resistance, thus predisposing to impaired greater circulation.
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