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Full-Text Articles in Medicine and Health Sciences
Changes In Ventricular Depolarisation Vectors During Exercise Caused By Regional Myocardial Ischaemia, Cameruddin Vellani, Satwat Hashmi, Sadia Mahmud, Mohammad Yusuf, Safia Awan, Khawar Kazmi
Changes In Ventricular Depolarisation Vectors During Exercise Caused By Regional Myocardial Ischaemia, Cameruddin Vellani, Satwat Hashmi, Sadia Mahmud, Mohammad Yusuf, Safia Awan, Khawar Kazmi
Section of Cardiology
Research at the Aga Khan University for several years has been directed to find a reliable, low-cost, portable, non-invasive method for identification of coronary artery disease, its location and extent. A new method has been devised to measure the magnitude and direction of cardiac electrical vectors in three perpendicular planes during physical exercise to identify reduction in myocardial excitability as the electrophysiological marker of hypoxia. This report shows that changes in electrical forces due to exercise-induced regional hypoxia serve as indicators of reversible myocardial ischaemia. Changes in the magnitude and direction of vectors at stages of the Bruce protocol were …
It’S Not Always Occam's Razor – The Case Of A Young Man With Subaortic Membrane With Superimposed Pulmonary Thromboembolism And Left Main Coronary Artery Disease, Hunaina Shahab, Abdul Baqi, Yusra Askari, Qurrat Ul Ain Aqeel, Kumail Khandwala
It’S Not Always Occam's Razor – The Case Of A Young Man With Subaortic Membrane With Superimposed Pulmonary Thromboembolism And Left Main Coronary Artery Disease, Hunaina Shahab, Abdul Baqi, Yusra Askari, Qurrat Ul Ain Aqeel, Kumail Khandwala
Section of Cardiology
Subaortic membrane (SAM) is a discrete fibromuscular structure which causes left ventricular outflow tract obstruction and leads to the symptomatology of valvular aortic stenosis. It is known to be associated with other congenital cardiac defects in around 30% of cases. However, it has not been associated with chronic pulmonary thromboembolism in the past. We present a case of a middle-aged Pakistani man who presented with dyspnea and hemoptysis. He was found to have a SAM and severe pulmonary hypertension on transthoracic echocardiogram. A coronary angiogram revealed non-obstructive left main coronary artery disease. A computed tomography (CT) scan chest was done …