A Practical Method for QTc Interval Measurement.

Objective The various formulae used for QT correction by heart rate (HR) require the execution of operations with the aid of calculators or applications. This study aimed to evaluate the performance of a simple rule for QTc estimation, comparing the measurements obtained with those provided by the commonly used equations of Bazett, Fridericia, Framingham, and Hodges. Methods We used the database of a previous observational study, which analyzed patients prospectively with acute pulmonary edema admitted in an emergency service.

Brugada phenocopy: Mechanisms, diagnosis, and implications.

Brugada phenocopies are Brugada-like ECG patterns induced by reversible clinical conditions. Baranchuk and colleagues characterized this condition in 2012, and since then the phenomenon has been increasingly reported. It has the same pattern classification of Brugada syndrome (i.

Transient triangular QRS-ST-T waveform with good outcome in a patient with left main coronary artery stenosis: A case report.

Triangular QRS-ST-T waveform, also known as "shark fin pattern", is an ECG presentation of ST segment elevation myocardial infarction with a unique wave composed by the QRS complex, the ST segment, and the T wave. It is associated with very poor prognosis and recently has been shown to be more common in patients with left main coronary artery (LMCA) involvement. Nevertheless, data supporting this correlation is scant.