The EKG,  in<unk>  is characterized by sinus tachycardia.
Anxiety electrocardiogram
Status asthmaticus electrocardiogram
Syncope electrocardiogram
Transient ischemic attack electrocardiogram
Pulseless electrical activity electrocardiogram
Altitude sickness electrocardiogram
Sleep apnea echocardiography or ultrasound
Hypothermia electrocardiogram