You Are Working as RN in Cardiac Emergency

You are working as RN in cardiac emergency. Which patient would you see first?

A) A patient with a history of deep vein thrombosis presenting with acute onset dyspnea and pink frothy sputum
B) A patient presenting with exertional chest pain for last one month
C) A patient with hypertension on regular medication presenting with postural giddiness
D) A patient who has come from the medicine ward with an exacerbation of CHF requiring IV furosemide