Action potential (AP) and [Ca.sup.2+] transient properties were quantified at: a) relatively slow pacing rates [150-ms interval, equivalent to 400 beats per minute (BPM)] to assess baseline properties; b) in response to premature pacing stimuli to assess recovery of AP and [Ca.sup.2+] properties as a function of diastolic interval; and c) at faster pacing rates (up to ~ 850 BPM) to induce AP duration (APD) and [Ca.sup.2+] alternans
(beat-to-beat alternation in duration or amplitude), which are sensitive indicators of increased arrhythmia risk and a predictor of SCD (Pastore et al.
Objective: To compare T wave alternans
in patients with cardiomyopathy and healthy controls.
One area of research includes investigating the roles of hyperkalemia and calcium handling components played in the genesis of alternans
in ischemia at the cellular level.
on 7 Dec 2014, while searching for specimens of Scolopendra alternans
Leach, 1813 (Scolopendromorpha: Scolopendridae) for research on the evolution of centipede venom, we discovered a large population of unknown centipedes in and around the property of the Island Christian School campus in Islamorada (24.936662[degrees]N, 80.614126[degrees]W), Upper Matecumbe Key, Monroe County, Florida, USA.
Karma  showed that three essential properties of the Noble model , the wavefront insensitivity, phase-wave back and alternans
, are absent in the FHN model.
Among specific topics are multiple mechanisms causing ventricular tachycardia, monophasic action potential recordings in atrial fibrillation and the role of repolarization alternans
, mapping and catheter ablation of ventricular arrhythmias in ischemic and scar-related substrates, the role of cardiac computed tomography imaging to guide catheter ablation of arrhythmias in complex cardiac morphologies, and epicardial mapping of longstanding persistent atrial fibrillation.
The company, which develops non-invasive diagnostic tests for cardiac disease, said total revenues fell to USD475,000 in July to September 2011 from USD793,000 a year earlier due to its shift to the Microvolt T-Wave Alternans
(MTWA) Module strategy, including reduced focus and sales of its stand-alone HearTwave II System.