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      Left Ventricular Diastolic Dysfunction in Type 1 (Insulin-Dependent) Diabetic Patients during Dynamic Exercise

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          Abstract

          The left ventricular diastolic and systolic functions were assessed in 27 strictly selected type 1 diabetic patients without overt heart disease and 50 age- and sex-matched control subjects. For evaluating left ventricular performance, complex mechanocardiography including digitized apexcardiography was used at rest and after symptom-limited, graded dynamic exercise. The values of diastolic/systolic time intervals and amplitude parameters did not differ significantly between the diabetic and control groups at rest. A longer value of corrected early apexcardiographic relaxation time (diabetics: 38.7 ± 2.6 ms, controls: 17.3 ± 2.1 ms, p < 0.001) and a smaller normalized amplitude of relaxation (diabetics: 0.014 ± 0.004 ms<sup>-1</sup>, controls: 0.056 ± 0.006 ms<sup>-1</sup>, p < 0.001) were observed after dynamic exercise suggesting disturbances of the early diastole in diabetic patients. No correlations could be found between the diastolic abnormalities and the diabetic control. Significant correlation was observed between the diastolic disorders and the duration of diabetes mellitus. Testing left ventricular performance by complex mechanocardiography including digitized apexcardiography after dynamic exercise in patients with type 1 diabetes might be useful for recognizing diastolic abnormalities even when no alterations could be identified at rest. Diastolic disorders could appear in diabetic patients without overt heart disease and clinical symptoms. Left ventricular systolic function might be normal, although exercise-induced alterations of diastolic function might already be present in type 1 diabetic patients.

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          Author and article information

          Journal
          CRD
          Cardiology
          10.1159/issn.0008-6312
          Cardiology
          S. Karger AG
          0008-6312
          1421-9751
          1990
          1990
          12 November 2008
          : 77
          : 1
          : 9-16
          Affiliations
          aIstván City Hospital, Merényi Medical Department, and bNational Institute of Cardiology, Research Department, Budapest, Hungary
          Article
          174574 Cardiology 1990;77:9–16
          10.1159/000174574
          2354481
          © 1990 S. Karger AG, Basel

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          Page count
          Pages: 8
          Categories
          Original Paper

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