Article

Angiography of the Coronary Arteries in the Live Dog

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Abstract

IMPROVEMENTS in coronary angiography are basic to further advances in diagnosis and treatment of diseased coronary arteries. Exact localization of coronary occlusions by roentgen study must become possible if restorative surgical technics ever are to be utilized. Clinically, an ideal angiographic technic must be without hazard to the patient, must produce consistent visible filling of all three major branches of the coronary arteries, and must be reproducible. As yet, such standards of excellence have not been met.1–4 It is the purpose of this paper to report our recent experience with angiography of the coronary arteries in healthy dogs.

Material and Method

Nine healthy mongrel dogs, each approximately 10 kg. in weight, comprised the series for our experiments. The dogs were anesthetized by intravenous injections of pentobarbital sodium (Nembutal sodium, Abbott). A no. 8 cardiac catheter, 50 cm. long, was inserted through one of the carotid arteries into the root of the aorta. The tip of the catheter was bent to make guidance possible. In one experiment the placement of the catheter was guided by fluoroscopy; in all others it was guided with the help of a continuous pressure-recording device. The strength of the pulsations (as felt through the fingers of the operator) and the form of the curve of the pressure that was being recorded indicated whether the tip of the catheter was above, against, or had gone through the aortic valve. Strong pulsations transmitted through the catheter gave evidence that its tip had not accidentally entered the ostium. . .


 

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