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Background and aim of study The TTK Chitra mechanical heart valve is being widely used in India. We present a hemodynamic study of this valve implanted in the mitral and aortic positions. Methods 547 patients had 654 valves implanted in the aortic and/or mitral positions. 230 patients underwent an echocardiography examination with Doppler evaluation, for estimating the effective orifice area and...
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