The Spatial Vectorcardiogram and Mean Spatial Ventricular Gradient in Normal Pregnant Women
Year: 1954
Type: article
Study design: Observational Study
Abstract: The spatial vectorcardiogram and the spatial ventricular gradient of normal subjects in the last trimester of pregnancy and in some of the same subjects following delivery have been studied. It was found that the vectorcardiograms could be divided into two groups on the basis of the form of the QRS sÊ-loops, as has been previously reported for other normal subjects. In some instances records taken after delivery or records taken during pregnancy with the subject in deep inspiration altered both the orientation and the form of the QRS sÊ-loop. Since these alterations were most likely due to changes in position of the heart and extracardiac tissues, it is suggested that these are factors determining the configurations of the two types of normal QRS sÊ-loops.
Source: Circulation
Authors: G. E. BURCH, J. A. ABILDSKOV, J. A. CRONVICH
Institution: Tulane University
Language: English
Topic: ECG Monitoring and Analysis
Subfield: Cardiology and Cardiovascular Medicine
Field: Medicine
Domain: Health Sciences
Open Access status: bronze
OpenAlex ID: W1968407760