…refer to Introduction to AV Blocks). The term block is somewhat imprecise in the context of first degree AV block, as it does not represent…

…which means that resistance in the pulmonary artery is high), whereas resistance in the systemic circulation (and thus the aorta) is relatively low. Figure 2…

…which means that resistance in the pulmonary artery is high), whereas resistance in the systemic circulation (and thus the aorta) is relatively low. Figure 2…

…dysfunction in the conduction system. The J point and the ST segment The ST segment corresponds to the plateau phase (phase 2) of the action

…is often ambiguous. Since the risk of attempting CPR is extremely low and the potentially catastrophic consequences of wrongfully withholding an attempt, CPR is often…

…ACC) discourage the use of exercise stress testing for the evaluation of coronary artery disease, which is due to the low sensitivity of the method …

ECG Introduction to ECG interpretation QT duration and corrected QT (QTc) duration ECG interpretation always includes an assessment of the QT interval (QT duration). The…

…and the cell depolarizes. At –40 mV voltage gated calcium (Ca 2+ ) channels open so that calcium flows into the cell and causes depolarization. Subsequently…

Cardiology Clinical medicine Introduction Cardiovascular disease becomes increasingly prevalent with advancing age, while its clinical expression and management become progressively more complex. Older adults, often…

…procedural complexity, and the relative merits of PCI and coronary artery bypass grafting (CABG). Definition and Pathophysiology From balloon angioplasty to coronary stents Balloon angioplasty…

ECG Introduction to ECG interpretation Video lecture: The ECG curve: P wave, PR Interval, Q wave, R wave, S wave, QRS complex, ST segment, T…

…Figure 2. The direction of the QRS complex. Axis deviation: right axis deviation (RAD) and left axis deviation (LAD) Causes of right axis deviation Normal…

…Introduction to ECG interpretation The electrical axis of the heart (heart axis) Although often ignored, assessment of the electrical axis is an integral part of…

…7 ). The explanation for this is as follows: The vector resulting from activation of the right ventricle does not come to expression , because it is…

…a wave front in water. Figure 2 shows the appearance of the action potential in contractile myocardial cells. Figure 2. The cardiac action potential in…

ECG Introduction to ECG interpretation Standard display of ECG leads in the 12 lead ECG Numerous conditions that can be diagnosed using the 12 lead…

…proved that beta blockers prolong life, alleviate symptoms and reduce the risk of hospitalization for patients with heart failure. Several landmark studies followed and proved…

…deposition of lipids into the coronary artery walls; indeed, atherosclerosis is a disease in which the immune system elicits an active inflammation within the artery…

ECG Introduction The traditional classification of acute coronary syndromes (ACS) into ST segment elevation myocardial infarction (STEMI), non STEMI (NSTEMI), and unstable angina (UA) has…

ECG Introduction to ECG interpretation 1. Which of the following ECG findings is typically considered a normal variant in asymptomatic athletes with no significant family…

…from one cell to the next using this route. Figure 2 . Schematic illustration of the myocardial syncytium. Note the branched cell structure and the connections…

…a consequence of increased resistance to empty blood into the right ventricle. This may be due to pulmonary valve stenosis, increased pulmonary artery pressure etc…

…Their duration is short; they typically disappear within minutes after a total occlusion in a coronary artery occurs (then of course, the ST segment will…

…death (SCD), Brugada syndrome (BrS) has evolved from an obscure electrocardiographic curiosity into a major focus of contemporary cardiac electrophysiology [1] . Recognized as a primary…

…Syndrome) [1] . Underlying Etiologies The etiology of VT is broadly dichotomized into structural heart disease (SHD) and structurally normal hearts, a division that profoundly influences…

Cardiology Myocardial ischemia and infarction Introduction Clinical assessment of coronary artery disease (CAD) requires integration of symptoms, cardiovascular risk, coronary anatomy, myocardial ischaemia, ventricular function…

Introduction to Coronary Atherosclerosis, Plaques, Atherothrombosis Coronary atherosclerosis is a chronic, progressive, and highly dynamic inflammatory disease of the arterial wall. It is characterized by…

…embolism, which may manifest as a rightward shift of the ECG axis [2] Causes of Left Axis Deviation: Left ventricular hypertrophy [11] Left heart disease…

ECG Introduction to ECG interpretation The ST segment: physiology, normal appearance, ST depression & ST elevation The ST segment corresponds to the plateau phase of the…

…repeated cycles of gradually increasing PR interval until an atrial impulse (P wave) is blocked in the atrioventricular node and the QRS complex does not…

ECG Introduction to ECG interpretation The ECG leads Before discussing the ECG leads and various lead systems, we need to clarify the difference between ECG…

…been discussed in Introduction to Exercise ECG. The most common indications are as follows: Assessment of cardiovascular risk in screening. Detection of coronary artery disease …

…difficult to differentiate between Mobitz type 1 and Mobitz type 2. A very simple rule of thumb can be applied to do this: whenever there…

ECG Video lecture: Introduction to Electrocardiology and ECG Interpretation