Can children of a patient with heart disease also get heart disease?

Sometimes: There are a couple heart conditions that are genetic, such as cardiomyopathy, and some arrhythmias. For the "ordinary" heart disease caused by cholesterol, high blood pressure, and such, it's more vague. While the lifetime risk of heart disease may be due to eating, alcohol use and smoking, and exercise, there is a genetic link in susceptibility. So if dad has heart disease, take care of yourself.

May be: Some cardiomyopathies and arrhythmias are familiar or inherited. Mostly autosomal dominant. Which mean that one copy of the gene fault, from either parents, is enough to cause the condition. Different from other forms of heart disease, like coronary artery disease, which is cause by many genes and affected by environmental causes like diet and lifestyle.