Short bursts of atrial tachycardia can sometimes occur suddenly may be due to organic heart disease or may be caused by drug interactions. Common causes of short bursts of atrial tachycardia are organic heart disease, such as valvular heart disease, coronary artery disease, hypertensive heart disease, cardiomyopathy, myocarditis, and pericarditis, as well as enlargement of the heart due to pulmonary heart disease, hypertension, and chronic ischemia. Inflammatory scarring is an important mechanism of atrial tachycardia. Sometimes short bursts of atrial tachycardia occur suddenly and can also be caused by drug-drug interactions, such as digitalis drugs, the antiarrhythmic drug quinidine, sympathomimetic amines, and penicillin allergy. In addition, the specific cause of the sudden appearance of short bursts of atrial tachycardia can only be clarified through cardiac ultrasound, coronary angiography and other aspects of the examination. If you find yourself with the symptoms of paroxysmal ventricular tachycardia, you should go to the hospital at the first time, do not use your own medicine to prevent the condition from worsening.