ABC of clinical electrocardiography: Atrial arrhythmias

Abstract

tion strategies. 16 Over the 12 months after randomisation, the total cost of consultations, referrals, investigations, and treatment was on average £404.31 in the endoscopy group compared with only £205.67 in the non-invasive H pylori testing group. Two smaller studies have compared H pylori testing with endoscopy in subgroups of patients with dyspepsia referred for endoscopy. 4 6 No differences were found between the two investigation strategies with respect to resolution of dyspepsia, use of drugs, or visits to the general practitioner. Use of endoscopy was reduced by 83% over the two year follow up.

Adherence, knowledge, and perception about oral anticoagulants in patients with atrial fibrillation at high risk for thromboembolic events after radiofrequency ablation

“…Atrial fibrillation (AF) is an arrhythmia characterized by abnormal and chaotic electrical pulse generation observed in the upper heart chambers (Goodacre & Irons, ). This condition is the most common heart rhythm disorder, with prevalence rates of 2.3‐3.4% in the general population (Friberg & Bergfeldt, , ; Wilke et al., ).…”

Atrial tachyarrhythmias and heart failure events in patients with arrhythmogenic right ventricular cardiomyopathy

“…We also identified patients with self-terminating ATAs and lasted >30 s on ICD interrogation. ATAs were classified as ATs if regular atrial waves of 100–250 bpm with a regular ventricular rhythm (variable ventricular rate) were observed, as AFLs if the regular baseline atrial rhythm was observed as flutter waves of 250–350 bpm with a regular ventricular rhythm (usually with an atrioventricular block) or as AFs if an irregular baseline atrial rhythm was observed as fibrillation waves with an irregular ventricular rhythm [15] . ATAs appearing only during electrophysiologic studies, atrioventricular nodal reentrant tachycardia or atrioventricular reentrant tachycardia were excluded.…”

Unsupervised classification of atrial heartbeats using a prematurity index and wave morphology features

“…P-wave morphology may be different from sinus beats and varies depending on the origin of the impulse in the atria. In some cases, P waves are even missing in APB, because consecutive T and P waves overlap [8].…”

“…Thus, APB can also be detected by means of heart rate variability (HRV) analysis. If the premature excitation is abrupt, there is a delay in sinusal node activation for the next cardiac cycle, which causes an alternating increase-decrease heart rate [8]. When the premature excitations are sustained in time, this alternating pattern disappears and turns into a constant raised heart rhythm.…”