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Title: Left ventricular dimensions and systolic function during spontaneous heart rate changes: an echocardiographic study. Author: Bett JH, Dryburgh L. Journal: Herz; 1981 Jun; 6(3):178-84. PubMed ID: 7250890. Abstract: We examined the relationships between spontaneous heart rate (or conversely cycle length) changes and left ventricular diastolic dimensions and indices of systolic function in twenty-three subjects. In most there was clearly an inverse relationship between rate and these indices and nearly always a positive correlation between performance and end-diastolic dimension. Previously described relationship between heart rate and mean velocity of circumferential fiber shortening are applicable only when the heart rate is constant.[Abstract] [Full Text] [Related] [New Search]