The QT interval corrected for heart rate (QTc) is ideally measured using Bazett's formula under which heart rate conditions?

…of 54% with evidence of impaired relaxation. Based on her LVEF, which of the following represents the correct classification for this patient's heart failure?

…at the cardiac apex. Multimodality imaging is utilized to determine the pathophysiology and assess the severity of her valvular heart disease (VHD). Based on her…

A 32-year-old woman with congenital heart disease (CHD) and an unrepaired intracardiac shunt is resuscitated from an out-of-hospital cardiac arrest due…

A 62-year-old man with heart failure and a reduced left ventricular ejection fraction of 35% presents with highly symptomatic, recurrent focal atrial tachycardia…

A 53-year-old male, with no known history of heart disease, experiences intense, constricting chest pain that started while he was shoveling snow. The…

In which patients are beta-blockers recommended regardless of heart failure symptoms?

A 68-year-old male with a history of chronic heart failure presents to the emergency department with worsening shortness of breath and lower extremity…

A 58-year-old male with a history of chronic heart failure and an implantable cardioverter-defibrillator (ICD) presents to the emergency department after receiving…

…his annual health screening. He is asymptomatic during the recording. Heart rate 67 beats per minute. Identify all abnormalities on the ECG. Click to zoom…

…Physical examination did not reveal anything unusual. The ECG shows a heart rate of 69 beats per minute. The PR interval is 180 ms (normal…