Yes, sudden withdrawal from alcohol can increase the risk of heart attack, especially in people who have pre-existing heart conditions. Heavy and chronic alcohol consumption can lead to changes in the structure and function of the heart, which can increase the risk of heart disease and heart attack. When a person suddenly stops drinking, it can cause a surge in adrenaline and other stress hormones, which can increase the heart rate and blood pressure, potentially triggering a heart attack. Therefore, it is important to seek medical advice before stopping drinking, especially if you have a pre-existing heart condition or a history of alcohol abuse.