منابع مشابه
Epicardial Lineages
The epicardium is the mono-layered epithelium that covers the outer surface of the myocardium from early in cardiac development. Long thought to act merely passively to protect the myocardium from frictional forces in the pericardial cavity during the enduring contraction and expansion cycles of the heart, it is now considered to be a crucial source of cells and signals that direct myocardial g...
متن کاملEpicardial Activation
were built, with approximately 400,000 microscopic elements arranged in rectangular parallelepipeds in each model. Simulations used the nonlinear Ebihara and Johnson membrane equations for the fast sodium current. Constructed models had histological features of ventricular myocardium. All models were anisotropic. In a subset of the models, an abrupt intramural rotation of the fiber axes was inc...
متن کاملEpicardial Origin
Whole-cell voltage-clamp experiments and single-channel current recordings in cell-attached patch mode were performed on enzymatically dissociated single ventricular myocytes harvested from feline endocardial and epicardial surfaces. The studies were designed to compare the characteristics of inward rectifier K' current (IK1) and delayed rectifier K' current (IK) between endocardial and epicard...
متن کاملAtrial tachycardia arising from an epicardial site with venous connection between the left superior pulmonary vein and superior vena cava.
We describe a case of atrial tachycardia originating from an epicardial site with a venous connection between the left superior pulmonary vein (LSPV) and superior vena cava (SVC). Initial endocardial mapping with multiple electrodes catheters demonstrated early endocardial activation at both the SVC and LSPV. However, radiofrequency applications at the SVC failed to terminate the atrial tachyca...
متن کاملRecurrent perimitral tachycardia using epicardial coronary sinus connection to bypass endocardial conduction block at the mitral isthmus.
Mitral isthmus (MI) ablation is one of the important steps in the context of persistent atrial fibrillation ablation. However, achieving a complete transisthmus conduction block is challenging. Furthermore, incomplete conduction block can increase the risk of recurrent perimitral atrial tachycardia (AT). We describe a case wherein endocardial conduction block across the MI line was established,...
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ژورنال
عنوان ژورنال: JACC: Clinical Electrophysiology
سال: 2019
ISSN: 2405-500X
DOI: 10.1016/j.jacep.2019.08.024