Characteristics of procedure-related factors (6351 procedures in 3753 individuals).

Notes: IQR interquartile range; BP blood pressure; hrs hours. *Procedures at which there was more than one pre-procedure (or post-procedure) complication are only counted once in the totals so the sum of individual complications is greater. ‡Procedures for which cardiopulmonary bypass would not be required, e.g. catheter intervention. †Excludes procedures in which duration is recorded as 0 minutes. Characteristics of procedure-related factors (6351 procedures in 3753 individuals).