I thought it was 20 cardiac cases, with pump and off-pump both counting toward that number? My program used to just have 2 months in CA2 year required (one home, one at a high-volume center), with most doing a third as a CA3 at the outside hospital. Now, we do three during CA2 (one home, two away), and most seniors do another one to three at outside hospitals. I did six between CA2 and CA3 year, with three during CA3 year as the only resident at a high volume practice just outside of a major metro area. Those were the best three months of residency.