According to CBS News, a study published in the European Heart Journal: Acute Cardiovascular Care has found that intense anger and anxiety can increase heart attack risk. The increased risk probably results from increased blood pressure and heart rate, tightening blood vessels and clotting. Out of 300 patients studied, 2.2 percent experienced intense anger within two hours before their heart attack. According to the researchers’ calculations, the risk of having a heart attack within two hours after an intense anger episode was 8.5 times higher than normal, and the risk was 9.5 times higher in the two hours after an extreme anxiety episode. The authors suggest preemptively testing heart disease patients for anger and anxiety issues so that they may be dealt with in order to avoid increased risk.