The patient suddenly feels chills all over the body after taking a beta blocker, calcium channel blocker, Clopidogrel, Aspirin, and Atorvastatin. She is unable to stand, walk or move. The BP monitor shows error and is not showing any BP value. When checked in sphygmomanometer there is Korotkoff sound at any point (no pulse). Also, the patient feels severe vomiting. What is the problem? Is it a shock or heart failure or cardiac arrhythmia or heart attack?