When Wagener thinks back before his first heart problems, he can recall some issues he’d largely ignored at the time, including night sweats and the occasional sudden spike in his heart rate while running. But the cardiac arrest “came as a complete surprise.” Wagener stayed in the hospital...
The J-point elevation may be due to a more prominent epicardial manifestation of the spike-and-dome action potential morphology, mediated by a transient outward potassium current (Ito) (45). Conditions that enhance Ito predispose the epicardium to regional all-or-none repolarization, resulting in ...
We hypothesize that adolescence is a time of particular risk due to hormonal and neural factors, the same that contribute to the spike in reflex syncope at this age. Certain medications may exacerbate ion channel dysfunction leading to enhanced ECG changes and arrhythmia in either LQTS (www....
Note: small, spike-like signals that occur with or without related exit to the ventricle producing PVCs. RVT = right ventricular; HRA = high right atrium; HBE1 and HBE2 = His bundle recording catheters; RVOT uni = right ventricular outflow tract unipola; AORT ablation =...
Here’s what their stories can teach you about prevention, warning signs, and fast action when help is needed.
Like heart rate, the QTc interval is influenced by core body temperature, and fluctuations in body temperature throughout the day may contribute to a day-night rhythm in the QTc interval [[38], [39], [40], [41], [42], [43]]. Earlier studies identified a morning spike in QTc ...
Generalized 3 Hz spike and wave discharges in a child with childhood absence epilepsy. Credit: Wikipedia. The leading cause of epilepsy-related death is a poorly understood phenomenon known as sudden unexpected death in epilepsy (SUDEP). The risk factors and causes of SUDEP remain unclear but res...