Myocardial Shortening Velocity as an Index for the Assessment of Myocardial Contractility

概要

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The myocardial shortening velocity of 20 patients was recorded by inserting a pair of prongs with strain gauges through a cardiac catheter into the right ventricular muscle. The patients were divided into 3 groups; Group 1: 5 normal controls, Group 2: 9 patients with heart diseases but without heart failure, Group 3: 6 patients with physical and hemodynamic findings of right heart failure. All the patients of Group 3 showed lower maximal myocardial shortening velocity, higher right ventricular end-diastolic pressure and higher tension-time index compared to those of Group 1 patients. The values of Group 2 scattered between those of Groups 1 and 2. Myocardial shortening velocity thus measured is not completely free from the effects of preload and afterload, but can easily be obtained also by other methods. The applicability of the shortening velocity for the assessment of myocardial contractility was discussed.
International Heart Journal刊行会の論文