Acute myocardial infarction and subclinical hyperthyroidism without significant coronary stenoses

Changing axis deviation and paroxysmal atrial flutter associated with subclinical hyperthyroidism

“…It has been reported that subclinical hyperthyroidism is not associated with coronary heart disease or mortality from cardiovascular causes [2] but it is sufficient to induce arrhythmias [1] including atrial fibrillation [3][4][5][6] and atrial flutter [7]. It has also been reported that increased factor X activity in patients with subclinical hyperthyroidism represents a potential hypercoagulable state [4,8]. Rarely, it has also been reported intermittent changing axis deviation during atrial fibrillation [9][10][11] and during atrial flutter [7].…”

Atrial fibrillation associated with subclinical hyperthyroidism

“…It has also been reported that increased factor X activity in patients with subclinical hyperthyroidism represents a potential hypercoagulable state. [4,8] We present a case of atrial fibrillation associated with subclinical hyperthyroidism, in a 78-year-old Italian woman. On July 16, 2008, at 01.37 a.m. a 78-year-old Italian woman was admitted to the emergency department complaining of palpitations and with an atrial fibrillation, confirmed on Ecg (Fig.…”

“…[1] It has been reported that subclinical hyperthyroidism is not associated with coronary heart disease or mortality from cardiovascular causes [2] but it is sufficient to induce arrhythmias [1] including atrial fibrillation [3][4][5][6] and atrial flutter [7]. It has also been reported that increased factor X activity in patients with subclinical hyperthyroidism represents a potential hypercoagulable state.…”

The Role of Hyperthyroidism in Patients With Myocardial Infarction With Normal Coronary Arteries

“…3,7 In the literature, most patients with MI associated with hyperthyroidism have normal coronary arteries (documented by both angiographic and postmortem studies). [2][3][4][5][6] Although these mechanisms explain MI in hyperthyroid patients, some authors claim that this concurrence is coincidental. 5,6 They emphasize that both coronary events and hyperthyroidism are common and most hyperthyroid patients do not experience such events.…”