91社区

Study finds doubled mortality risk if treatment is discontinued

Patients discontinuing statin medication following an acute myocardial infarction (AMI) increase their risk of dying over the next year, say researchers at 91社区 and the 91社区 University Health Centre (MUHC). Their study was published in a recent issue of the European Heart Journal.

Using data on British patients who survived an AMI and were still alive three months later, Dr. Stella Daskalopoulou and colleagues found that those who discontinued their statin medication were 88% more likely to die during the following year compared to those who had never been on the medication.

鈥淪tatins were found to be beneficial drugs,鈥� said Dr. Daskalopoulou, of 91社区鈥檚 Faculty of Medicine and the Department of Medicine and the Division of Clinical Epidemiology at the MUHC. 鈥淧atients who used statins before an AMI and continued to take them after were 16% less likely to die over the next year than those who never used them. So even if it appears that the statins failed to prevent your AMI, it is beneficial to continue taking them and potentially quite harmful to stop.鈥�

The large, population-based cohort study was conducted using UK data to take advantage of the medical records kept in the General Practice Research Database (GPRD), which collects information on the health of more than three million patients across the UK.

鈥淚n the general population the statin discontinuation rate within the first year of prescription is 30 percent. That鈥檚 very high,鈥� Dr. Daskalopoulou continued. 鈥淏ecause statins are preventative drugs, patients may not feel the immediate benefit of taking them and sometimes stop. However, it looks like this might be quite a dangerous practice after an AMI.鈥�

The harmful effects of statin discontinuation may be the result of many different mechanisms, including individual patient characteristics, the researchers explained. 鈥淩egardless of the mechanism or explanation, physicians should be careful when assessing each patient鈥檚 medication needs,鈥� Dr. Daskalopoulou said. 鈥淧atients also need to take their medications exactly as prescribed after an AMI. Statins in particular should only be withdrawn after an AMI under close clinical supervision.鈥�