Changing axis deviation and paroxysmal atrial flutter associated with subclinical hyperthyroidism

Complications of Hyperthyroidism

“…Over recent decades this state has also been found to be associated with some abnormalities in cardiac function. Enhanced systolic function and impaired diastolic function due to slowed myocardial relaxation may cause increased left ventricular mass in these subjects, together with increased heart rate and arrhythmias by similar mechanisms as overt hyperthyroidism [77,78]. In people over 60 years of age subclinical hyperthyroidism was associated with a tripled risk of atrial fibrillation during a 10-year followup period [79].…”

Revelation of changing axis deviation at the end of atrial fibrillation during acute myocardial infarction

“…It has been rarely reported changing axis deviation [1][2][3][4] also during atrial fibrillation [5]or atrial flutter [6,7]. Changing axis deviation has been also rarely reported during acute myocardial infarction [8][9][10][11][12][13][14][15][16] associated with atrial fibrillation too [17,18].…”

Wellens' syndrome and other electrocardiographic changes in a patient with a left anterior descending artery subocclusion associated with a left main coronary artery subocclusion

“…Changing axis deviation has been reported [1][2][3][4] also during atrial fibrillation [5,6] or atrial flutter [7,8].Changing axis deviation has been also reported during acute myocardial infarction [9][10][11][12][13][14][15][16][17][18][19] associated with atrial fibrillation too [20,21] or at the end of atrial fibrillation during acute myocardial infarction [22]. Patients with unstable angina have a higher incidence of left main coronary artery (LMCA) and proximal left anterior descending (LAD) coronary artery disease compared to patients with stable angina pectoris [23,24].…”