Diagnosis typically involves: - Medical History Review: A thorough review of the patient’s medical history, including cancer treatments and any pre-existing conditions. - Physical Examination: A detailed physical exam to check for signs of heart disease or other related conditions. - Electrocardiogram (ECG): This test records the electrical activity of the heart and can help identify irregularities in heart rhythm. - Blood Tests: To check for electrolyte imbalances, thyroid function, and other potential causes of palpitations. - Imaging Studies: Such as an echocardiogram or chest X-ray, to visualize heart function and structure.