[Assisted circulation to the right ventricle through pulmonary counterpulsation using a biological method].
OBJECTIVE
To study the hemodynamic effects of latissimus dorsi dynamic pulmonaroplasty in open chest animals.


METHODS
Six anesthetized mongrel dogs were subjected to diastolic counterpulsation using electrically stimulated latissimus dorsi muscle flap wrapped around the aortic and pulmonary arteries roots and gated to the surface electrocardiogram. Aortic and Pulmonanary pressures as well as cardiac output and cardiac index were measured.


RESULTS
Diastolic counterpulsation resulted in a significant increase in cardiac output (from 2.35 +/- 0.26 to 2.45 +/- 0.28 l/min) (p < 0.005) and cardiac index (from 0.108 +/- 0.020 to 0.113 +/- 0.020 l/min/kg) (p < 0.05). The diastolic pulmonary arterial efficiency index showed a significant increase when latissimus dorsi stimulation was on (from 8.37 +/- 0.60 to 11.65 +/- 0.83 mmHg); (p < 0.005).


CONCLUSIONS
Latissimus dorsi dynamic pulmonaroplasty provides an effective means of arterial counter pulsation in open chest dogs.
Lacoste
M O
MO
Centro de Pesquisas de Ciências Básicas, Instituto Universal de Ciências Biomédicas, Fundação Favaloro, Buenos Aires.
Fernandes
J
J
Christen
A I
AI
Chachques
J C
JC
Cabrera Fischer
E I
EI
D000818:Animals; D001011:Aorta / Q000601:surgery*; D001794:Blood Pressure; D015908:Counterpulsation / Q000379:methods*; D004285:Dogs; D004562:Electrocardiography; D011651:Pulmonary Artery / Q000601:surgery*; D013524:Surgical Flaps; D018497:Ventricular Dysfunction, Right / Q000503:physiopathology / Q000628:therapy*
Assistência circulatória ao coração direito através da contrapulsação pulmonar usando-se um método biológico.