A 48-year-old man presents to the Emergency Department by ambulance after patient was found to be unresponsive in his care. According to the paramedics, patient is found to be in the rhythm as below:

65 yo F w/ hx HTN, GERD, presents to the ED w/ non-exertional intermittent chest pain x4 days, dyspnea on exertion x2 days and nausea x1 day. Trying Prilosec and Tums. ECG below. 

You are evaluating a patient with the sudden onset of palpitations. You note a regular, narrow complex tachycardia at a rate of 160 bpm and suspect a reentrant tachycardia. You think "adenosine" but secretly wonder if there is a better option, or what you'll do if this fails....

For decades, Emergency Medicine Providers have struggled to come to a consensus on the management of patients with chest pain with non-ischemic ECGs and negative biomarker testing. Both cardiology and emergency medicine guidelines failed to provide a clear recommendation on which patients should be discharged from the ED. The American College of Emergency Physicians has taken a bold step with their latest guidelines for the management of low risk chest pain patients which will dramatically change standard practice in the care of possible ACS patients.  

A 28-year old male with no past medical history presents with ches tpain for 2 days. The pain is pressure-like in the center of his ches tand worse with deep inspiration. He states he just got over a cold but denies recent fever or cough. An EKG is obtained. What is the diagnosis?

Here is your quick guide to rate and rhythm control of atrial fibrillation with rapid ventricular response.