Feeds: Posts Comments. What is the function of moderator band of right ventricle? What is the function of pectinate muscles of heart? Pectinate muscles are specialized Intracardiac muscle Pectinate muscles are located mainly in the right atrium , more in right atrial appendage , sparse in left atrium Has muscle fibers arranged in a comb like fashion. Has less mechanical activity, no significant contribution to atrial contractility.
Can stretch and improve the voluminous nature of right atrium The pectinate muscle folds act as RA volume reserve during adverse loading conditions. It helps RA dilate with out much wall stress. Rarely it can be a cell of origin for focal atrial tachycardia Image Source : Greys anatomy. Rate this:. Like this: Like Loading Leave a Reply Cancel reply Enter your comment here A prominent pectinate muscle in the right atrium known as the taenia sagittalis is present in the majority of people.
Please Note: You can also scroll through stacks with your mouse wheel or the keyboard arrow keys. Updating… Please wait. Unable to process the form. Check for errors and try again. Thank you for updating your details. Log In. Sign Up. FDA on Musculi pectinati. CDC on Musculi pectinati. Books on Musculi pectinati. Musculi pectinati in the news. Be alerted to news on Musculi pectinati. News trends on Musculi pectinati. Blogs on Musculi pectinati.
Definitions of Musculi pectinati. Patient resources on Musculi pectinati. Discussion groups on Musculi pectinati. Patient Handouts on Musculi pectinati.
Directions to Hospitals Treating Musculi pectinati. Risk calculators and risk factors for Musculi pectinati. Spontaneously-beating muscles increase their rate and force of contraction in response to drugs which have positive chronotropic and inotropic effects in the whole heart. Because the force of contraction of the pectinate muscle is a function of the rate of beating, inotropic effects of agents should also be evaluated in preparations which are electrically paced at a constant rate.
0コメント