Bandagem reversível do tronco pulmonar IV: análise da hipertrofia aguda do ventrículo direito em modelo experimental de sobrecarga intermitente

Objectives: Adjustable pulmonary trunk (PT) bandingdevice may induce a more physiologic ventricle retrainingfor the two-stage Jatene operation. This experimental studyevaluates the acute hypertrophy (96 hours) of the rightventricle (RV) submitted to an intermittent pressureoverload. Methods: Five groups of seven young goats were distributedaccording to RV intermittent systolic overload duration (0,24, 48, 72 and 96 hours). The zero-hour group served as acontrol group. Echocardiographic and hemodynamicevaluations were performed daily. After completing thetraining program for each group, the animals were sacrificedfor water content and cardiac masses evaluation. Results: There was a significant increase in RV free wallthickness starting with the 48-hour group (p