Tag: electrocardiography

Lithium overdoses causing cardiotoxicity are uncommon and electrocardiographic changes suggesting myocardial ischemia are rare. However, some authors have specifically reported the occurrence of ischemic electrocardiography changes due to a lithium overdose...

Lithium overdoses causing cardiotoxicity are uncommon and electrocardiographic changes suggesting myocardial ischemia are rare. However, some authors have specifically reported the occurrence of ischemic electrocardiography changes due to a lithium overdose...

Wellens’ syndrome is a pattern of electrocardiography T-wave changes associated with critical proximal left anterior descending artery lesion. Patients with Wellens’ syndrome are at high risk of the development of extensive myocardial infarction of the anterior wall and death...

Atrial flutter (AFL) is a rapid, regular atrial tachyarrhythmia that occurs most commonly in patients with underlying structural heart disease. AFL with 1:1 atrioventricular (AV) conduction is a rare occasion. We describe a 70-year-old male patient with hyperthyroidism in whom AFL was associated with 1:1 AV conduction...

Despite the advancements in pharmacological and non-pharmacological management of atrial fibrillation (AF) observed during last decades, available treatment modalities and predictors of their success are still far from optimal. Understanding of pathophysiological mechanisms underlying AF and assessment of atrial electrophysiological properties using easily available non-invasive diagnostic tools such as surface ECG are essential for further improvement of patient-tailored treatment strategies..

Cardiac resynchronization therapy (CRT) has added a new dimension to the electrocardiographic evaluation of pacemaker function. During left ventricular (LV) pacing from the posterior or posterolateral coronary vein, a correctly positioned lead V1 registers a tall R wave and there is right axis deviation in the frontal plane with few exceptions...

The interval from the pacemaker stimulus to the onset of the earliest paced QRS complex (latency) may be prolonged during left ventricular (LV) pacing. Marked latency is more common with LV than right ventricular (RV) pacing because of indirect stimulation through a coronary vein and higher incidence of LV pathology including scars...

By measuring the pressure decline caused by coronary narrowing, fractional flow reserve (FFR) is an index of the physiological significance of a vessel stenosis. Intracoronaryelectrocardiogram (IC-ECG) recording from an angioplasty guidewire is more sensitive than standard ECG in detecting regional myocardial ischemia...