…of the normal electrocardiogram (ECG / EKG) Figure 1. The classical ECG curve with its most common waveforms. Important intervals and points of measurement are depicted…

…activated and contracts. Figure 1 illustrates the relevant components of the conduction system, the heart and the classical ECG waveforms. Figure 1 . The cardiac cycle…

…occlusion of small penetrating arteries that provide blood to deep structures. Lacunar stroke results in five classical lacunar syndromes, namely: (1) pure motor stroke/hemiparesis …

…The most classical ECG finding is generalized ST segment depressions with curved ST segment (generalized implies that the depressions may occur in most ECG leads…

…Conversely, patients with chronic renal failure may have very high values without the classical ECG findings. A rapidly rising potassium is usually more dangerous than…

…corticosteroids. The time limit and the choice of closure strategy The classical limit of 6–8 hours for primary closure rests on weak evidence. More…

…mechanisms. Beck’s Triad The classical clinical triad consists of: Hypotension Jugular venous distension Muffled or absent heart sounds The triad suggests severe tamponade, but…

…Chest pain or discomfort remains the cardinal symptom of CCS, but presentations are frequently non classical. Contemporary clinical populations include only a minority with symptoms…

…more likely to be found in a young patient with a clear family history and less likely in an older patient with non classical features…

…greater prevalence of MVA. Symptoms may be persistent or episodic and may not follow a classical pattern of stable exertional angina. Vasospastic angina should be…

…intervals is given. Figure 1. The classical ECG curve with its most common waveforms. Important intervals and points of measurement are depicted. ECG interpretation requires…

…effects, and the condition is classified as cardiac tamponade. The classical signs of cardiac tamponade are hypotension, muffled heart sounds and jugular venous distention. Other…

Cardiology Emergency medicine Definition and Pathophysiology Acute aortic syndromes comprise classic aortic dissection, intramural haematoma (IMH), and penetrating atherosclerotic ulcer (PAU). Aortic dissection accounts for…

…penetrating atherosclerotic ulcer, aortic pseudoaneurysm and traumatic aortic injury. In classic dissection, an intimal tear permits blood to enter the diseased aortic media. Blood then…

…The diagnostic requirements for LBBB vary by the stringency of the criteria applied: Classic Criteria : These include a QRS duration of $\ge 120$ msec…

…inhibitor therapy is bradykinin mediated rather than mast cell mediated, distinguishing it from classic allergic reactions. Clinical Presentation and Symptoms ACE Inhibitor Induced Cough ACE…

…an hour of arterial occlusion. The classic clinical constellation is remembered as the “six Ps”: Pain Paresthesia Pallor Pulselessness Poikilothermia, or coldness Paralysis Pain is…

…as pressure, tightness, or heaviness [7]. Classically, it is initiated by exertion or stress and is relieved by rest or nitroglycerin [4], [6]. Presentation Nuances…

…beds. Malignant hypertension represents an extreme form in which acute microvascular injury occurs, classically involving fibrinoid necrosis of small arteries in the kidneys, retina, and…

…artery occlusion causing transmural ischemia and requiring urgent reperfusion, even in the absence of classic ST elevation. Multiple studies have demonstrated the superior sensitivity of…

…mastering the nuances of anticoagulation requires an intimate understanding of the underlying pathophysiology, which is classically framed by Virchow’s triad: blood stasis, endothelial dysfunction…

…receptors (e.g., SR A, CD36) that, unlike the classic LDL receptor, are not downregulated by intracellular cholesterol accumulation. Consequently, macrophages indiscriminately phagocytose oxLDL until…

…STEMI criteria and occlusion patterns on the ECG Classic ST elevation criteria New ST elevation at the J point in at least two anatomically contiguous…

…slow gait without describing classic claudication. In older adults, approximately 40% are asymptomatic, 50% report atypical leg symptoms and fewer than 10% have classic claudication…

…considerations Type 1 Contrast staining of the arterial wall with multiple lumens or radiolucent channels The classic appearance and usually readily recognized Type 2 Long…

…in Brugada syndrome. Pathophysiology and Genetic Architecture Genetic Architecture: From Monogenic to Polygenic Models Brugada syndrome was classically defined as a monogenic, autosomal dominant channelopathy…