Transient reversal of blood flow in an internal thoracic artery to coronary artery graft during syncope.
Transcutaneous duplex ultrasound can be used to image and quantify blood flow in the proximal part of the internal thoracic artery to coronary artery bypass grafts. In addition to providing information about graft patency and blood flow for follow-up purposes, the technique also provides an opportunity to study the physiology and pharmacology of the coronary circulation. In this paper we describe and attempt to interpret an unusual pattern of internal thoracic artery graft blood flow observed during inadvertent nitrate-induced syncope.
Mauric
A
A
Department of Medicine, University of Leicester, U.K.
Samani
N J
NJ
de Bono
D P
DP
D001026:Coronary Artery Bypass; D003326:Coronary Circulation / Q000502:physiology*; D018610:Heart Bypass, Right; D006801:Humans; D008297:Male; D008875:Middle Aged; D005996:Nitroglycerin / Q000009:adverse effects; D012039:Regional Blood Flow; D013575:Syncope / Q000139:chemically induced / Q000000981:diagnostic imaging / Q000503:physiopathology*; D013895:Thoracic Arteries / Q000000981:diagnostic imaging* / Q000502:physiology*; D018608:Ultrasonography, Doppler
D005996:Nitroglycerin