This letter exploits fundamental characteristics of a wavelet transform image to form a progressive octave-based spatial resolution. Each wavelet subband is coded based on zeroblock and quardtree partitioning ordering...This letter exploits fundamental characteristics of a wavelet transform image to form a progressive octave-based spatial resolution. Each wavelet subband is coded based on zeroblock and quardtree partitioning ordering scheme with memory optimization technique. The method proposed in this letter is of low complexity and efficient for Internet plug-in software.展开更多
Atrial fibrillation (AF) is the most common sustained arrhythmia encounteredin clinical practice.1 Its incidence increases with age and the presence of structural heartdisease. It is a major cause of stroke, especiall...Atrial fibrillation (AF) is the most common sustained arrhythmia encounteredin clinical practice.1 Its incidence increases with age and the presence of structural heartdisease. It is a major cause of stroke, especially in the elderly. It has been shown thatangiotensin converting enzyme inhibitor (ACEI) can reduce the incidence of AF after acute myocardialinfarction.2 Several studies have shown that activation of the rennin-angiotensin system isassociated with the mechanisms of AF. Irbesartan is a long-acting angiotensin II type 1 receptorantagonist used widely in the treatment of hypertension.3 In recent years, it has been demonstratedthat patients treated with amiodarone plus irbesartan had a lower rate of recurrence of atrialfibrillation than did patients treated with amiodarone alone.4 These findings suggest that theinhibition of angiotensin II may prevent AF, but its underlying electrophysiological mechanisms areobscure. The purpose of this study is to investigate the effects of irbesartan on atrial cellelectrophysiology.展开更多
文摘This letter exploits fundamental characteristics of a wavelet transform image to form a progressive octave-based spatial resolution. Each wavelet subband is coded based on zeroblock and quardtree partitioning ordering scheme with memory optimization technique. The method proposed in this letter is of low complexity and efficient for Internet plug-in software.
文摘Atrial fibrillation (AF) is the most common sustained arrhythmia encounteredin clinical practice.1 Its incidence increases with age and the presence of structural heartdisease. It is a major cause of stroke, especially in the elderly. It has been shown thatangiotensin converting enzyme inhibitor (ACEI) can reduce the incidence of AF after acute myocardialinfarction.2 Several studies have shown that activation of the rennin-angiotensin system isassociated with the mechanisms of AF. Irbesartan is a long-acting angiotensin II type 1 receptorantagonist used widely in the treatment of hypertension.3 In recent years, it has been demonstratedthat patients treated with amiodarone plus irbesartan had a lower rate of recurrence of atrialfibrillation than did patients treated with amiodarone alone.4 These findings suggest that theinhibition of angiotensin II may prevent AF, but its underlying electrophysiological mechanisms areobscure. The purpose of this study is to investigate the effects of irbesartan on atrial cellelectrophysiology.
