Heart throbs for a few seconds. What's going on?

If the patient exhibits a throbbing heart for a few seconds, consider the following: First, considering cardiogenic diseases, such as unstable angina pectoris of coronary heart disease, severe arrhythmia, heart failure or acute myocarditis and acute pericarditis, these conditions will cause transient ischemia, stenosis and spasm of coronary artery, and there will be clinical symptoms of cardiac pain, but pain will normally be accompanied by chest distress, shortness of breath, dyspnea and other clinical symptoms and manifestations. Second, if the patient shows respiratory diseases, such as pneumothorax caused by various factors, especially in tension pneumothorax, traffic pneumothorax, or large pleural effusion, acute lung infection, acute bronchitis, pleurisy, then there will also be precordial pain, but normally it will gradually increase with breathing.