QT interval in cardiac amyloidosis

Cardiac amyloidosis presenting with prolonged QT interval and recurrent polymorphic ventricular tachycardia.

Cardiac amyloidosis results in severely symptomatic heart failure that has a poor prognosis because of the development of a restrictive cardiomyopathy. The diagnosis of cardiac amyloidosis is often delayed because of nonspecific signs and symptoms. We report the case of a 66-year-old woman who had been diagnosed with sick sinus syndrome and presented 5 months later with a long QT interval and r...

QT Interval and QT Variability

Genetic determinants of QT interval variation and sudden cardiac death.

Electrocardiographic QT interval prolongation or shortening is a risk factor for sudden cardiac death. The study of Mendelian syndromes in families with extreme long and short QT interval duration and ventricular arrhythmias has led to the identification of genes encoding ion channel proteins important in myocardial repolarization. Rare mutations in such ion channel genes do not individually co...

Association of short PR interval, long QT interval and sudden cardiac death in a young male.

A 26-year-old man came to our hospital for paroxysmal palpitations accompanied by profuse sweating, dry heaves, and considerable psychomotor agitation unrelated to effort (sudden onset during physiological sleep). He was transferred to the recovery unit for assessment and symptom management. During the patient’s stay in the unit, his overall condition deteriorated unexpectedly, ventricular tach...

Determination of sensitivity and specificity of QT interval in ECG of diabetic patients for ndiagnosis of cardiac autonomic neuropathy

one of the important complications of diabetes mellitus that physicians pay less attention to is diabetic autonomic neuropathy(DNA) ,especially cardiac autonomic neuropathy (CAN).this has a poor prognosis and is accompanied by sudden death risk,recently several investigations that were carried out for CAN detection ,suggested that QT-interval prolongation in these patients is an important diagn...