Investigating the effect of remote ischaemic preconditioning on biomarkers of stress and injury-related signalling in patients having isolated coronary artery bypass grafting or aortic valve replacement using cardiopulmonary bypass: study protocol for a randomized controlled trial

Table 1 Data collection

	Two ventricular biopsies	Blood samples	Participant’s characteristics
Pre-op			✓
before RIPC		✓
Immediately after RIPC		✓
Immediately before CPB	✓
20 minutes after the end of ischemic cardioplegic arrest	✓
6 hr postop*		✓
12 hr postop*		✓
24 hr postop*		✓
48 hr postop*		✓
72 hr postop*		✓

*postop = end of ischemic cardioplegic arrest. CPB, cardiopulmonary bypass; RIPC, remote ischaemic preconditioning.

ISSN: 1745-6215