Heart disease is a very common illness in our daily lives. What are the complications of heart disease? The category of heart diseases is broad; here we will discuss some common ones, such as coronary heart disease. Patients with coronary heart disease are prone to develop heart failure, leading to symptoms such as shortness of breath and difficulty breathing, or atrial fibrillation. Atrial fibrillation often leads to complications like thrombosis. For instance, a dislodged thrombus can cause a cerebral infarction, resulting in symptoms like hemiplegia, weakness in one side of the body, and speech disturbances. Additionally, certain severe myocardial diseases can lead to malignant arrhythmias, causing sudden death in patients, which is often very serious.