Peculiarities of the First Heart Sound in Bundle Branch Blocks : A New Interpretation Based on Graphic Analysis

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概要

• 論文の詳細を見る

• A phonocardiographic study in a medium frequency range was made over various areas of the precordium in 27 cases of right bundle branch block (RBBB), 28 cases of left bundle branch block (LBBB), and 30 normal subjects of the same age. The various components of the first heart sound plus the pulses at the suprasternal notch and the right carotid artery were studied in regard to timing, relationship with the ECG and the arterial pulses, intervals between components, and amplitude.The timing and intervals of the three components of the first sound were found normal in RBBB and so were the arterial pulses; apparent wide splitting was occasionally noted, due to recording of the first (a) and third (c) components, the latter being larger, as frequently observed in old age. All three components of the first sound were found small and delayed in LBBB; a delay of the arterial pulses was also noted. No additional component that might be attributed to the right heart preceded the delayed first sound.

• International Heart Journal刊行会の論文

著者

• LUISADA Aldo

  Department of Physiology and Biophysics, the Chicago Medical School, University of Health Scienses

• PORTALUPPI Francesco

  "Clinica Medica", University of Ferrara

• LUISADA Aldo

  Department of Medicine of the Chicago Medical School University of Health Sciences

• PORTALUPPI Francesco

  "Clinica Medica", University of Ferrara

関連論文

• Sympathetic Influence on Ventricular Compliance
• Peculiarities of the First Heart Sound in Bundle Branch Blocks : A New Interpretation Based on Graphic Analysis
• The pulmonary component of the second heart sound in acquired aortic stenosis.
• On the Function of the Aortic Valve and the Mechanism of the First and Second Sounds

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