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      Clinical Value of Calibrated and Differentiated Displacement Apexcardiography in Ischemic Heart Disease

      a , b

      Cardiology

      S. Karger AG

      Relaxation, Apexcardiogram, First derivative of the apexcardiogram, Contractility

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          Abstract

          The calibrated left apexcardiogram with time constant 4 s and its first derivative (dA/dt) has been evaluated in 62 patients with ischemic heart disease and in 50 normal subjects. The normalized positive peak of dA/dt (max dA/dt/Ad), the peak velocity of contractile element shortening (Vpm), the normalized negative peak of dA/dt (min dA/dt/Ar), and the time constant of myocardial relaxation T as well as the time interval from R wave of the electrocardiogram to the peak positive dA/dt (R-max dA/dt) and the total apexcardiograp-hic relaxation time interval divided to mean arterial pressure (TRI) were measured. In patients with ischemic heart disease we found a decrease of max dA/dt/Ad, Vpm, min dA/dt/Ar and an elongation of T, R-max dA/dt, and TRI, when compared to controls.

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          Author and article information

          Journal
          CRD
          Cardiology
          10.1159/issn.0008-6312
          Cardiology
          S. Karger AG
          0008-6312
          1421-9751
          1982
          1982
          07 November 2008
          : 69
          : 6
          : 343-352
          Affiliations
          aMedical Academy, Higher Medical Institute, Department of Internal Medicine, Varna, Bulgaria; bHungarian Institute of Cardiology, Semmelweis University, Department of Cardiology, Budapest, Hungary
          Article
          173525 Cardiology 1982;69:343–352
          10.1159/000173525
          7159881
          © 1982 S. Karger AG, Basel

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          Page count
          Pages: 10
          Categories
          Original Paper

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