NCT03766529

Loop Isolation-based Uploading Pre-conditioning

Loop Isolation-based Uploading Pre-conditioning to Protect Heart From Ischemic-Reperfusion Damage in Coronary Artery Bypass Surgery

• Status: Unknown
• Phase: —
• Study type: Observational
• Enrollment: 60 (estimated)
• Sponsor: Nanjing Medical University · Academic / Other
• Sex: All
• Age: 50 Years – 90 Years
• Healthy volunteers: Not accepted

Summary

Myocardial protection is of crucial importance for surgical coronary revascularization in patients with ischaemic heart diseases. The investigators proposed loop isolation-based uploading preconditioning to protect heart from ischemic-reperfusion damage (LiuPhD) as a novel cardioprotective strategy, and applied to patients who underwent on-pump coronary artery bypass grafting (CABG).

Detailed description

Myocardial protection is of crucial importance for surgical coronary revascularization in patients with ischaemic heart diseases. Considerable effort has been made to optimize cardioprotective strategy for improving cardiac performances after global myocardial ischemia. Of various strategies, terminal warm blood cardioplegia (TWBC) delivery has been proven to be effective in reducing risk of ischemic attack at the time of myocardial reperfusion. Based on TWBC strategy and Frank-Starling law of heart, the investigators proposed loop isolation-based uploading preconditioning to protect heart from ischemic-reperfusion damage (LiuPhD) as a novel myocardial protective strategy, which procedurally renders coronary loop via brief warm blood delivery independent of extracorporeal loop following TWBC delivery just before declamping. The investigators hypothesize that LiuPhD strategy allows myocardial cells complete depolarization and drives heart into zero-loading heat cycles, contributing to enhancing myocardial physiologic reserve and improving cardiac initiative capacity responding to upcoming loading increases after onset of clamp release. The aim of the present study was to determine whether LiuPhD strategy during on-pump coronary artery bypass grafting (CABG) can attenuate reperfusion injury after global myocardial ischemia.

Conditions

• Ischaemic Heart Diseases

Interventions

Type	Name	Description
PROCEDURE	loop isolation-based uploading preconditioning (LiuPhD)	declamping was not done until heart could resume normal mechanical activities and sustain well for three minutes in terms of heart rate, rhythm, and myocardial contractility via continuous antegrade warm blood delivery closely following TWBC reperfusion.

Timeline

• Start date: 2016-01-01
• Primary completion: 2018-12-01
• Completion: 2018-12-01
• First posted: 2018-12-06
• Last updated: 2018-12-07

Locations

1 site across 1 country: China