Cell contraction and calcium transient are decreased in a single ventricular myocyte after CHF establishment.

心衰后心肌细胞收缩功能减弱，钙瞬变幅度减小。

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Methods Enzyme digestion was used to isolate single ventricular myocyte and whole cell patch clamp technique was used to record potassium current.

膜片钳技术是一种以记录离子通道的离子电流来反映细胞膜上单一的或多个的离子通道分子活动的技术。

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To study the effect of chitosan on delayed outward potassium current(IK) in single ventricular myocytes of guinea pig and investigate its antiarrhythmic mechanism from ion channel view.

研究壳聚糖对豚鼠单一心室肌细胞延迟外向钾电流（I_k）的作用，从离子通道角度初步探讨其作用机理。

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Patients with persistent or permanent atrial fibrillation are also indicated for single chamber ventricular pacers unless efforts are being made to restore sinus rhythm.

FORBES: Overview of the New HRS/ACCF Pacemaker Guidelines

Single chamber ventricular pacing is considered an acceptable alternative in sedentary patients or those in whom technical issues make atrial lead placement difficult or impossible.

FORBES: Overview of the New HRS/ACCF Pacemaker Guidelines

Dual chamber pacing in SND is also favored over single chamber ventricular pacing (VVI), as it has been shown to reduce the risk of development of atrial fibrillation and the symptoms of pacemaker syndrome.

FORBES: Overview of the New HRS/ACCF Pacemaker Guidelines