Impulse Delay in the Cardiac Conduction System

نویسندگان
چکیده

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Conduction of the Cardiac Impulse

The excitability of short segments (5-7 mm) of bundles of canine Purkinje fibers was depressed by exposure to 15-18 mM K(+), to 15-18 mM K(+) plus 5 x 10(-6) epinephrine or norepinephrine, to low K(+), and to low Na(+). The depressed segment was in the center chamber of a three-chamber bath; the ends of the bundle were exposed to normal Tyrode solution. Each method of depression resulted in slo...

متن کامل

Conduction of the cardiac impulse. II. Summation and inhibition.

A segment of a bundle of canine Purkinje fibers was encased in agar made up in Tyrode solution containing elevated K (47 ITIM) to depress the excitability of the segment. At a degree of depression producing total block of conduction in each direction through the depressed segment, exciting both ends of the bundle yielded full excitatory responses in the center of the depressed area. These respo...

متن کامل

Conduction System in Cardiac Rejection

Correlation of electrocardiographic abnormalities occurring postoperatively with lesions of the conduction system found at autopsy was done in 20 dogs which had received cardiac homografts. The incidence of arrhythmias closely paralleled the severity of rejection injury found within the heart and specifically within the conduction system. Severe pathological changes in the conduction system (gr...

متن کامل

The cardiac conduction system in situs ambiguus.

The cardiac specialized conduction tissue was studied by serial sectioning in 13 cases of situs ambiguus. In four cases of right isomerism, we found paired sinus nodes in relation to a crista terminalis, and in each case a sling of conduction tissue between two atrioventricular nodes was present regardless of the ventricular morphology or cardiac position. In the cases with left isomerism, the ...

متن کامل

Electrotonic modulation of cardiac impulse conduction by myofibroblasts.

Structural remodeling of the myocardium associated with mechanical overload or cardiac infarction is accompanied by the appearance of myofibroblasts. These fibroblast-like cells express alpha-smooth muscle actin (alphaSMA) and have been shown to express connexins in tissues other than heart. The present study examined whether myofibroblasts of cardiac origin establish heterocellular gap junctio...

متن کامل

ذخیره 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: Global Journal of Science Frontier Research

سال: 2020

ISSN: 2249-4626,0975-5896

DOI: 10.34257/gjsfrfvol20is3pg29