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…

A 28-year-old female who recently immigrated from a low-income country presents to the cardiology clinic with progressive dyspnea on exertion, orthopnea, and…

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…

…year old male patient with hypertension. ECG is recorded during his annual health screening. He is asymptomatic during the recording. Heart rate 67 beats per…

…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…