It is recommended that heart patients should drink at least 8–10 glasses of water per day. However, if you are particularly physically active or live in a hot climate, it may be necessary to increase your intake to 12–15 glasses per day. Additionally, it is important to spread out your water consumption throughout the day and avoid drinking large amounts of water at once. It is also important to note that caffeine and alcohol can lead to dehydration and should be avoided or consumed in moderation.