What type of pacemaker is evident in this ECG tracing?

During pregnancy, which of the following is (are) more complicated?

A. Metabolism and kinetics of drugs B. Weight gain C. Host defenses D. Sperm function

On entering an apartment for a call related to a confused elderly female patient, you note that the air conditioner is running on high and the room is extremely cold. Which other clue obtained during the scene size-up would best indicate that this patient may be suffering from urban hypothermia?

A) Patient covered with diaphoresis B) Fan blowing directly onto the patient C) Oxygen concentrator next to the patient D) Medication for hypertension next to the patient