…depolarizes the ventricles) passes through the bundle of His, and hence it originates in the atria. In other words: tachycardias with narrow QRS complexes originate…

…potentially indicating microvascular dysfunction or other pathologies. The software allows for detailed regional analysis of myocardial perfusion, highlighting specific segments of the left ventricle that…

…to the QRS morphology during LBBB. Stimulation in other regions of the ventricle may result in a different QRS morphology. If the lead tip is…

…events in the setting of a stent thrombosis or restenosis. Type 1 myocardial infarction Definition and pathophysiology Type 1 MI results from acute coronary atherothrombosis…

…platelets and coagulation factors, which results in thrombus formation (Figure 1). Disruption of an atherosclerotic plaque may also release atherosclerotic debris downstream, causing microvascular embolization…

…women, respectively, should be considered abnormal. A common cause of abnormally large T waves is hyperkalemia, which results in high, pointed and asymmetric T waves…

…in the myocardium. The electrical potential difference exists between ischemic and normal myocardium and it results in displacement of the ST segment. The ST segment…

…simultaneously as the cause of the arrhythmia already affects cellular function. This results in electrical instability which explains why ventricular tachycardia may progress to ventricular…

ECG Introduction to ECG interpretation The QRS complex (ventricular complex): normal and abnormal configurations and intervals A complete QRS complex consists of a Q , R…

…favorable neurological recovery exhibited an abnormal pupillary reflex upon initial examination. Notably, 31.2% of patients discharged with intact neurological function were observed to lack…