Table 1.

Relative and absolute contraindications for MCS use (local SOP during the conduct of the registry)

	CPR	No CPR
Relative contraindication
Biological age (years)	>60	>70
Absolute contraindications
Initial pH value	<6.8	<7.1
Initial lactate (mmol/L)	>20	>15
Limiting comorbidities	COPD > III Neurological, internal, or oncological diseases with palliative treatment
Furthermore	Contraindication for full anticoagulation (bleeding, trauma, hemothorax, etc.)
	No bystander‐CPR/no‐flow time > 10 min CPR > 45 min without ROSC	‐

Abbreviations: COPD, chronic obstructive pulmonary disease; CPR, cardiopulmonary resuscitation; MCS, mechanical circulatory support; ROSC, return of spontaneous circulation; SOP, standard operating procedure.