How is heart disease diagnosed? What are its early symptoms? Actually, the concept of heart disease is very broad as it includes many diseases related to the heart. Generally, it refers to problems with the structure or function of the heart, or its inability to perform its pumping function. Its early symptoms can include chest tightness, chest pain, or a crushing feeling after activity, and some may even radiate to the back or the inside of the arms, even involving the shoulders, presenting symptoms like increased heart rate, palpitations, tinnitus, and breathing difficulties. All these are related to heart disease. But how can we determine what kind of heart disease it is? We believe that the first step is to visit a hospital for tests such as electrocardiograms (ECG), ambulatory ECGs, exercise stress tests, and other imaging tests including coronary CT and even coronary angiography. Of course, some biochemical tests are also necessary, such as myocardial enzymes, troponins, myoglobins, brain natriuretic peptides, immunological and biological tests, which all help to determine the nature of the heart disease. In summary, we must pay special attention to heart disease, and once these symptoms appear, we should seek medical attention promptly and early.