A 67-year-old woman arrives at the emergency department complaining of palpitations. Upon examination, her ECG reveals tall tented T waves. What causes the distinctive shape of the T wave, which corresponds to phase 3 of the cardiac action potential?
A 67-year-old man is brought to the emergency department with unilateral weakness and loss of sensation. He is later diagnosed with an ischaemic stroke. After initial treatment, he is started on dipyridamole as part of his ongoing therapy.
What is the mechanism of action of dipyridamole?
Which of the following complications is the least commonly associated with ventricular septal defects in pediatric patients?
A 33-year-old woman delivers a baby boy in the delivery room. The midwife observes microcephaly, polydactyly, and low-set ears during the neonatal assessment. Trisomy 13 is confirmed through rapid genetic testing. What is the most commonly associated cardiac abnormality with this condition?
A 65-year-old man was brought to the emergency department due to a respiratory infection. After receiving antibiotics and showing signs of improvement, he suddenly collapsed before being released. An ECG was performed and revealed fast, irregular QRS complexes that seemed to be twisting around the baseline.
Which antibiotic is the probable culprit for the aforementioned situation?
A 40-year-old man undergoes a routine health check and his ECG reveals a prolonged QT segment. He has no medical history and is not taking any medication. His father and grandfather both died from sudden cardiac arrest in their early 30s.
What arrhythmias are most likely to occur as a result of this ECG abnormality?
Evelyn is a 92-year-old woman who arrives at the hospital with severe chest pain, shortness of breath, and palpitations. Given her medical history of angina and diabetes mellitus, doctors suspect acute coronary syndrome. They order several tests, including a troponin I blood test. What is the function of this biomarker in the body?
An 80-year-old man visits his doctor complaining of dizziness upon standing. He has recently been diagnosed with heart failure, with a left ventricular ejection fraction of 35%. The doctor diagnoses him with orthostatic hypotension.
What are the possible causes of this type of heart failure?
A 57-year-old man is diagnosed with angina and prescribed medications for symptom control and secondary prevention. The doctor advises him to make dietary changes to address excess fat in the blood that can lead to angina. During the explanation, the doctor asks which apolipoprotein macrophages recognize to uptake lipids under normal circumstances?
A 65-year-old man presents for a coronary angiogram due to worsening symptoms of unstable angina. The cardiologist observes multiple significant coronary stenoses, which are likely related to the patient’s numerous risk factors, including hypertension, heavy smoking, hypercholesterolemia, and type 2 diabetes mellitus. What is the ultimate step in the development of this pathology?