Long QT syndrome & Torsades depointes

The elderly man, who had previously collapsed at home, was admitted to the emergency department. He was previously diagnosed with ischemic heart disease (IHD) and Chronic Obstructive Pulmonary Disease (COPD). He was already on medication for these conditions, but a new medication had recently been added for fever and productive cough.

Upon examination, the patient displayed a blood pressure of 85/65 mmHg, elevated jugular venous pressure (JVP), bilateral pitting edema, and bilateral basal crepitations. After initial resuscitation, he was transferred to the ward for further monitoring and to evaluate the cause of his collapse. During this time, the cardiac monitor revealed episodes of polymorphic ventricular tachycardia. Which of the following is the cause of the collapse?

A young boy collapsed while swimming after recently joining a club. According to his attendants, he had been in good health with no history of seizures, epilepsy, medication use, or substance addiction. All baseline investigations, including creatine phosphokinase (CPK), returned normal results. However, an electrocardiogram (ECG) indicated a corrected QT interval of 0.5 seconds. Upon further inquiry, it was discovered that his father had experienced sudden death at an early age. Which one is the cause of the collapse?

A young boy presented to the outpatient department (OPD) after collapsing while playing cricket. He spontaneously regained consciousness. His mother, providing the medical history on his behalf due to his congenital deafness and muteness, mentioned that he had been prescribed antibiotics for fever and a productive cough. Physical examinations revealed no notable findings, and all investigations returned normal results, except for the electrocardiogram (ECG), which indicated a corrected QT interval of 0.48 seconds. What diagnosis can be inferred from these findings?

A 30-year-old man presented to the emergency department after collapsing at home while watching television. There is no family history of cardiac illness or premature death. He has not taken any recent medication. Upon examination, his pulse is 76/min, regular with good volume, and his blood pressure is 110/70 mmHg. Chest and precordium examinations reveal no abnormalities. Laboratory tests, including CBC, serum electrolytes, and magnesium, are within normal ranges. However, his ECG indicates ST-segment elevation in V1, V2, and V3, along with right bundle branch block. What is the likely diagnosis?

A young man was brought to the emergency department after collapsing while watching TV. The attendants provided a history that he had no underlying health conditions. Among the following, which condition may lead to sudden death during rest or at night?