ELECTROCARDIOGRAPHIC CHANGES DURING OPERATIONS FOR PULMONARY STENOSIS

Electrocardiographic changes during oesophagogastroscopy.

BACKGROUND Oesophagogastroduodenoscopy (EGD) should be very safe, but there are many potential hazards, although the rate of serious complications is small. There are so many complications that can arise during this procedure. Most of these complications involve the respiratory or cardiovascular systems, especially in sick or sedated patients.The aim of this study was to determine the various e...

Electrocardiographic Changes during Lithium Treatment

Electrocardiographic changes have been reported during therapy with psychotropic drugs—such as tricyclic anti-depressants (Schou 1963 ; Burrows et al., 1976 ; Reed and McKim 1978) and lithium (Tilkian et al., 1976a, 1976b; Wren and Dana 1976; Jefferson and Greist 1979). Lithium Carbonate affects ionic fluxes across cell membranes—-particularly those of sodium, potassium, calcium and magnesium (...

Electrocardiographic changes during pressure breathing.

It was recognized many years ago that the form of the electrocardiogram could be modified by a voluntary increase of breathing pressure, as during the Valsalva manceuvre (Kahn, 1909). During the early part of the second world war further studies were undertaken by German workers (Zettel and Fink, 1939; Muller, 1941), and it was found that it was altered even by the small fluctuations of breathi...

Pulmonary artery stenosis after systemic-to-pulmonary shunt operations.

OBJECTIVE Systemic-to-pulmonary shunt operations are still required for palliation of certain congenital heart defects. The aim of this study was to analyze the incidence and etiology of the development of pulmonary artery stenosis after these procedures. METHODS AND RESULTS Pre- and post-operative angiograms of 59 patients who underwent 54 peripheral and 12 central shunt operations were anal...

Electrocardiographic changes during selective coronary angiography.