Table E1.

Composition of del Nido cardioplegia in standard and reverse ratio

Cardioplegia component	Conventional cardioplegia	Del Nido cardioplegia standard ratio 1:4 blood:crystalloid	Del Nido cardioplegia “reverse ratio” 4:1 blood:crystalloid
K, mmol/L	23.5	20.55	8.139
Mg, mmol/L	0.66	6.33	2.198
Ca, mmol/L	1.8	0.450	1.800
Lidocaine, mmol/L	0	0.420	0.104

Calculations used the following blood electrolyte levels: potassium 4.0 mmol/L, magnesium 2.0 mg/dL, calcium 9.0 mg/dL. K, Potassium; Mg, magnesium; Ca, calcium.