Having one small alcoholic drink a day raises the risk of developing an irregular heartbeat, a condition that causes dizziness and palpitations and leaves people more prone to strokes, a study has found. Researchers examined the heart health and drinking habits of 108,000 people aged 24 to 97 by combining records from Sweden, Norway, Finland, Denmark and Italy that stretched over 14 years. Their analysis confirmed the long-held belief that a...