…fibrillation with onset during hyperthyroidism (thyrotoxicosis), alcohol overdose, thoracic surgery, acute myocardial infarction, pericarditis/myocarditis or pulmonary embolism is often a reversible arrhythmia with low…

…guideline discussion. By contrast, the benefit of beta blockers in patients with CAD without previous MI and with normal LVEF is uncertain. Similarly, evidence for…

…myocardial oxygen demand or worsen ischaemia, including anaemia, uncontrolled hypertension, thyrotoxicosis, tachyarrhythmias, uncontrolled heart failure, and concomitant valvular heart disease. In patients with ANOCA/INOCA…

…primary hyperparathyroidism or neoplastic etiologies. Other causes include immobilization, sarcoidosis, thyrotoxicosis, familial hypocalciuric hypercalcemia, Addison's disease, renal insufficiency, therapeutic interventions with tamoxifen or lithium…

…levels do not have any effect on the ECG, nor cardiac rhythm, or impulse conduction. 2. Calcium Hypercalcemia Causes of hypercalcaemia Primary hyperparathyroidism and malignancies…