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Premature atrial contractions are often benign, requiring no treatment. Occasionally, the patient having the PAC will find these symptoms bothersome, in which case the doctor may treat the PACs. Sometimes the PACs can indicate heart disease or an increased risk for other cardiac arrhythmias. In this case, the underlying cause is treated.
As this PAC conducts down the left bundle, it will depolarize the septum then proceed retrograde up the right bundle. Eventually, this will reach refractory conduction tissue and stop. The subsequent beat — if early enough — will find the right bundle still refractory and the process will repeat yielding a continued RBBB morphology.
In computational learning theory, probably approximately correct (PAC) learning is a framework for mathematical analysis of machine learning. It was proposed in 1984 by Leslie Valiant . [ 1 ]
Swan sitting on its packaging. A pulmonary artery catheter (PAC), also known as a Swan-Ganz catheter or right heart catheter, is a balloon-tipped catheter that is inserted into a pulmonary artery in a procedure known as pulmonary artery catheterization or right heart catheterization.
The hybrid PAC is required to maintain two separate bank accounts for the two types of expenditures, and to register with the Federal Election Commission (FEC) and report all receipts and disbursements for both accounts. [1] In essence, the hybrid PAC is the equivalent of a traditional PAC and a super PAC operating under the same roof.
Independent expenditure-only political action committees, better known as super PACs, are a type of political action committee (PAC) in the United States.Unlike traditional PACs, super PACs are legally allowed to fundraise unlimited amounts of money from individuals or organisations for the purpose of campaign advertising; however, they are not permitted to either coordinate with or contribute ...
Bigeminy is a cardiac arrhythmia in which there is a single ectopic beat, or irregular heartbeat, following each regular heartbeat.Most often this is due to ectopic beats occurring so frequently that there is one after each sinus beat, or normal heartbeat.
Partial anterior circulation infarct (PACI) is a type of cerebral infarction affecting part of the anterior circulation supplying one side of the brain.. Partial anterior circulation stroke syndrome (PACS) refers to the symptoms of a patient who clinically appears to have had a partial anterior circulation infarct, but who has not yet had any diagnostic imaging (e.g. CT Scan) to confirm the ...