On the contrary, the Col15a1−/− AMI mice had a sizable increase in LV dilatation compared with the corresponding sham mice; LV diastolic volume was 78 μL in the sham mice and 131 μL in the AMI mice (P < 0.001), indicating accelerated post‐MI remodelling. Here, COL15A1 is linked to myocardial infarction.