| Cardiology referral (n = 75) | No referral (n = 39) | P value | |
|---|---|---|---|
| Medications | |||
| β blockers | 55 (73%) | 2 (5%) | < 0.0001 |
| ACE inhibitors | 66 (88%) | 5 (13%) | < 0.0001 |
| MRA | 10 (13%) | 1 (3%) | 0.06 |
| Loop diuretic | 21 (28%) | 3 (8%) | 0.01 |
| Trastuzumab interruption | 74 (99%) | 35 (90%) | 0.03 |
| Trastuzumab re-started | 40 (53%) | 25 (64%) | 0.27 |
| Completed planned trastuzumab | 26 (35%) | 20 (51%) | 0.09 |