Arrhythmias/EKGs
100
A previously healthy 28-year-old man comes to the emergency department because of dizziness and palpitations for 2 days. Prior to the onset of the symptoms, he attended a bachelor party where he lost several drinking games. An ECG is shown. Which of the following is the most likely diagnosis?
(a) HOCM
(b) Dilated cardiomyopathy
(c) Paroxysmal A-fib
(d) Brugada syndrome
(e) Sick sinus
(f) V tach
(c) Paroxysmal a-fib.
R-R intervals irreg-irreg.
No discernible P-waves.
200
A 23-year-old man comes to the emergency department because of palpitations, dizziness, and substernal chest pain for three hours. The day prior, he was at a friend’s wedding, where he consumed seven glasses of wine. The patient appears diaphoretic. His pulse is 220/min and blood pressure is 120/84 mm Hg. Based on the patient's findings on electrocardiography, the physician diagnoses atrial fibrillation with rapid ventricular response and administers verapamil for rate control. Ten minutes later, the patient is unresponsive and loses consciousness. Despite resuscitative efforts, the patient dies. Histopathologic examination of the heart at autopsy shows an accessory atrioventricular conduction pathway. Electrocardiography prior to the onset of this patient's symptoms would most likely have shown which of the following findings?
(a) Slurred upstroke of QRS complex
(b) Cyclic alteration of QRS axis
(c) Pseudo-RBBB w/ST elevation in V1-V2
(d) QT interval prolongation
(a) Slurred upstroke of QRS complex.
WPW syndrome.
Delta-wave, short PR interval, widened QRS.