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      Systolic Time Intervals in Isolated Septal Defects before and after Corrective Surgery

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          Abstract

          Systolic time intervals (STI) were analyzed in 34 patients with isolated ventricular septal defect (VSD) and unidirectional left-to-right shunt. 14 of the patients who underwent corrective surgery were followed-up for at least 10 years. The measurements were obtained from simultaneous high speed photographic recordings of electrocardiogram, external carotid pulse and phonocardiogram. Before the operation the Q-I sound interval and, consequently, the pre-ejection period were significantly prolonged and the left ventricular ejection time significantly abbreviated, the degree of abbreviation relating with the magnitude of the shunt. The above deviations persisted after corrective surgery, and only several years after the operation the parameters studied became normal. It is concluded that the most likely explanation for these abnormalities is the depressed contractility of the left ventricle, secondary to the long-standing volume overload, which tends to persist after corrective surgery.

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          Author and article information

          Journal
          CRD
          Cardiology
          10.1159/issn.0008-6312
          Cardiology
          S. Karger AG
          0008-6312
          1421-9751
          1984
          1984
          11 November 2008
          : 71
          : 4
          : 177-183
          Affiliations
          Istituto di Patologia Speciale Medica e Metodologia Clinica, Sezione di Cardiologia, Università di Modena, Italia
          Article
          173662 Cardiology 1984;71:177–183
          10.1159/000173662
          6478463
          © 1984 S. Karger AG, Basel

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          Page count
          Pages: 7
          Categories
          Original Paper

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