High-fidelity fiberoptic pressure catheters can reliably obtain first and second derivatives of left ventricular pressure to assess myocardial contractility.
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May aid research assessment of myocardial contractility; leaves open clinical adoption without further validation.
Authors' synopsis Peak ilalues of the normalized .first and second dericatices of left iIentricular pressure, which are tneasured during the isorolumic contraction period, hace been shown to be useful measures for assessing myocardial rontractilitj,. These indices were readily obtained from high speed pressure tracings by means of a jiberoptic pressure catheter which has an unusually high frequency response and low noise lewl.
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Nejad et al. (1971) studied this question.
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