Haemodynamics in the horse: 1. Pressure pulse contours.
Using a catheter with 2 transducers, one mounted at the tip and one 9 cm proximal to it, enabled transvalval pressure waveforms to be recorded in 8 horses. A simultaneous electrocardiogram acted as a time base. The changing waveforms produced in the chambers of the heart and great vessels are described and related to the events of the cardiac cycle. The effect of second degree AV block, ectopic beats, a pan diastolic murmur and chronic obstructive pulmonary disease are described.
D000818:Animals; D016275:Atrial Function; D006328:Cardiac Catheterization / Q000662:veterinary; D003971:Diastole; D004562:Electrocardiography / Q000662:veterinary; D006325:Heart Atria / Q000503:physiopathology; D006327:Heart Block / Q000503:physiopathology / Q000662:veterinary; D006734:Horse Diseases / Q000503:physiopathology; D006736:Horses / Q000502:physiology*; D007601:Jugular Veins / Q000502:physiology / Q000503:physiopathology; D008173:Lung Diseases, Obstructive / Q000503:physiopathology / Q000662:veterinary; D011651:Pulmonary Artery / Q000502:physiology / Q000503:physiopathology; D011674:Pulse; D013599:Systole