A 16-year-old boy is brought to the ER by his mother due to sudden onset of heart palpitations. He has no prior medical conditions or family history of any disease. Blood pressure is 115/75 mm Hg and pulse is 160/min and regular. The physician applied a gentle neck massage just below the angle of the right mandible and his condition is immediatly improved. His blood pressure is now 120/80 mm Hg and pulse is 70/min. Which of the following mechanisms is responsible for improvement of this patient's condition?

Question

A 16-year-old boy is brought to the ER by his mother due to sudden onset of heart palpitations. He has no prior medical conditions or family history of any disease. Blood pressure is 115/75 mm Hg and pulse is 160/min and regular.  The physician applied a gentle neck massage just below the angle of the right mandible and his condition is immediatly improved.  His blood pressure is now 120/80 mm Hg and pulse is 70/min.  Which of the following mechanisms is responsible for improvement of this patient's condition?

Quizplus · Accepted Answer

Eductional Objective: In paroxysmal supraventricular tachycardia., applying neck massage below mandibular will stimulate carotid sinus that result in increasing parasympathetic tone causing temporary inhibition of sinoatrial node activity, slowing of conduction through the atrioventricular (AV) node, and prolongation of the AV node refractory period.

A 16-Year-Old Boy Is Brought to the ER by His