Alternating P Wave Morphology
نویسندگان
چکیده
منابع مشابه
P-Wave Morphology in Focal Atrial Tachycardia
OBJECTIVES The purpose of this study was to perform a detailed analysis of the P-wave morphology (PWM) in focal atrial tachycardia (AT) and construct and prospectively evaluate an algorithm for identification of the anatomic site of origin. BACKGROUND Although smaller studies have described the PWM from particular anatomic locations, a detailed algorithm characterizing the likely location of a ...
متن کاملChange in P wave morphology after convergent atrial fibrillation ablation
Convergent atrial fibrillation ablation involves extensive epicardial as well as endocardial ablation of the left atrium. We examined whether it changes the morphology of the surface P wave. We reviewed electrocardiograms of 29 patients who underwent convergent ablation for atrial fibrillation. In leads V1, II and III, we measured P wave duration, area and amplitude before ablation, and at 1, 3...
متن کاملOrthogonal P-wave morphology is affected by intra-atrial pressures
BACKGROUND It has previously been shown that the morphology of the P-wave neither depends on atrial size in healthy subjects with physiologically enlarged atria nor on the physiological anatomical variation in transverse orientation of the left atrium. The present study aimed to investigate if different pressures in the left and right atrium are associated with different P-wave morphologies. ...
متن کاملAge-related changes in P wave morphology in healthy subjects
BACKGROUND We have previously documented significant differences in orthogonal P wave morphology between patients with and without paroxysmal atrial fibrillation (PAF). However, there exists little data concerning normal P wave morphology. This study was aimed at exploring orthogonal P wave morphology and its variations in healthy subjects. METHODS 120 healthy volunteers were included, evenly...
متن کاملAlternating Function Classes Within P
We de ne the notion of adding \small amounts" of nondeterminism to a deterministic function class, and give a machine model; the result is a functional AC closure of the deterministic class. We characterize, by the \safe parameters" technique, the classes of functions computable in linear and in quasilinear time on a multi-tape Turing machine. We then combine these two results by extending the ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Circulation
سال: 2019
ISSN: 0009-7322,1524-4539
DOI: 10.1161/circulationaha.118.038396