先将MITDB数据库中的ECG记录从360 Hz下采样到250 Hz。另外,由于原始的ECG信号经常被不同类型的噪声所污染,例如电力线干扰,基线漂移和肌肉噪声 [31],这些伪影使用Daubechies小波6进行去噪处理。随后,将经过滤波的ECG信号以4 s的长度进行分段,并根据注释进行分类,每个ECG分段包含1000个采样点。然后在将心电图片段进行...
On ECG, the hallmark pattern is “saw-toothed” flutter waves, which are best viewed in leads II, III, and V1. The atrial rate is on average approximately 300 atrial bpm.3 Since the AV node cannot respond this quickly, there is an AV block that can present as a 2: 1, 3: 1, or...
Atrial Flutter ECG ReviewAtrial flutter occurs when a “reentrant” circuit is present, causing a repeated loop of electrical activity to depolarize the atrium at a rate of about 250 to 350 beats per minute; the atrial rate in atrial fibrillation is 400 to 600 bpm. ...
A 67-year-old man without prior heart disease presented with atrial flutter, with a 12-lead electrocardiogram (ECG) suggestive of typical atrial flutter. The patient underwent electrophysiology study and was found to have atypical atrial flutter, with entrainment mapping indicating likely left-sided ...
ECG features of atrial flutter Narrow complex tachycardia Regular atrial activity at ~300 bpm Loss of the isoelectric baseline “Saw-tooth” pattern of inverted flutter waves in leads II, III, aVF Upright flutter waves in V1 that may resemble P waves ...
Electrocardiogram(EKG or ECG).In this quick, painless, noninvasive test, electrodes are attached to your chest, arms, and legs in order to measure and record your heart’s electrical activity. If you are in an episode of atrial flutter, your EKG reading will show that. ...
Regular atrial tachycardias classically are classified into flutter or tachycardia, depending on the rate and presence of a stable baseline on the ECG. How... N Saoudi,F Cosio,A Waldo,... - 《J Cardiovasc Electrophysiol》 被引量: 1143发表: 2001年 ...
Atrial flutter (AFL) is not a mechanistic diagnosis but an electrocardiographic (ECG) description, based on morphology and rate, so that a rate above 240 cycles/min and the lack of a stable baseline between deflections, separates AFL from atrial tachycardia [1]; however, this ECG classification...
Atrial fibrillation should be differentiated from atrial flutter and atrial tachycardia with varying A-V response. Tachycardia with wide QRS complexes (and an irregular ventricular response) are either due to aberrancy or to anomalous AV-conduction (WPW syndrome). Furthermore an irregular ventricular ...
Discrimination between normal sinus rhythm (NSR), atrial fibrillation (AF) and atrial flutter (AFL) using the surface electrocardiogram (ECG) through direc... J.J. Rieta,J Millet-Roig,V Zarzoso,... - Computers in Cardiology 被引量: 47发表: 2002年 Acute management of atrial fibrillation and...