Save. Employers typically post job openings as full or part time. Often, these postings include the terms exempt or non-exempt in the descriptions. Full or part time refer to how the employer classifies the job for its own purposes.ave. Employers typically post job openings as full or part time. Often, these postings include the terms exempt or non-exempt in the descriptions. Full or part time refer to how the employer classifies the job for its own purposes.
Pathophysiology of Cardiac Causes of Tachycardia. Cardiac causes of tachyarrhythmias may either be a result of disturbance in the formation of an electrical impulse (i.e. abnormality of the sinoatrial node) or an alteration of the conduction of the same (e.g. bundle branch block, Wolf-Parkinson-White syndrome).
During rest, the speed of electrical signals originating from the SA node is slow, thus the heart beats slowly. During exercise or excitement, the speed of signals from the SA node increases, and heartbeat quickens. Tachycardia occurring because of rapid firing by the SA node is called sinus tachycardia. Sinus tachycardia is usually a rapid contraction of a normal heart responding to a condition or disease state. Sinus tachycardias can cause palpitations.