Fig. 1.

Histogram of longevity of explanted porcine bioprostheses (n = 483) according to patient ABO blood [A Group (gray) or non-A Group (black)]. Each group is further divided into 3 categories of longevity: low <6 years, intermediate [6–14.9] or high ≥15 years (vertical lines); n = number of patients in each category. Horizontal axis: Longevity (in years); Vertical axis: number of cases per half year. P value is for subgroup effect. SD = Standard Deviation; y = year; n = number; Bioprosth = Bioprosthesis.