Pathophysiology of palpitations the mechanisms responsible for the sensation of palpitations are unknown. Syndrome of inappropriate sinus tachycardia refers to sinus node dysfunction causing rapid, physiologically inappropriate, heart rates Symptoms are pronounced and include palpitations, orthostatic and exercise intolerance, weakness, fatigue, dyspnea, chest discomfort, and anxiety Treatment is augmentation of vagal tone, reduction of sympathetic tone, and. Atrial fibrillation is a rapid, irregularly irregular atrial rhythm Symptoms include palpitations and sometimes weakness, effort intolerance, dyspnea, and presyncope
Atrial thrombi may form, causing a significant risk of embolic stroke Treatment involves rate control with medications, prevention of thromboembolism with anticoagulation, and sometimes. Acute myocardial infarction is myocardial necrosis resulting from acute obstruction of a coronary artery Symptoms include chest discomfort with or without dyspnea, nausea, and/or diaphoresis Diagnosis is by electrocardiography (ecg) and the presence or absence of biomarkers Many noninvasive and invasive tests can delineate cardiac structure and function (see table tests for assessing cardiac anatomy and function)
