…coronary angiography or other invasive procedures, and affected patients may be relatively painless compared with those with spontaneous dissection. Clinical manifestations may result from rupture…

…are: Plaque rupture with exposure of thrombogenic material. Superficial plaque erosion. Thrombosis associated with a calcified nodule. Epicardial or microvascular coronary spasm. Spontaneous coronary artery…

…80% of cases. Other causes include acute mechanical complications—particularly ventricular septal defect (VSD) and papillary muscle rupture with acute severe mitral regurgitation—predominant right…

…plaque rupture, coronary artery spasm, coronary microvascular dysfunction (encompassing endothelial dysfunction, smooth muscle cell dysfunction, and dysregulation of sympathetic innervation), coronary embolism, and spontaneous coronary…

…for: characterizing the surface of atheroma; measuring fibrous cap thickness; distinguishing thrombus from plaque; evaluating occult plaque rupture; identifying spontaneous coronary dissection or intramural hematoma…

…rupture or plaque erosion with thrombosis, despite the absence of an angiographically obstructive lesion Coronary embolism or thrombus Epicardial coronary vasospasm Coronary microvascular dysfunction Spontaneous…

…and pathophysiology Spontaneous coronary artery dissection (SCAD) is an acute coronary disorder caused by separation within the coronary arterial wall, usually through formation of an…

…seizures and temperature management. The ICU is the preferred level of care for the absolute majority. The CCU may be suitable for stable (hemodynamically and…

…ECG should be recorded in all patients after return of spontaneous circulation (ROSC). The purpose of a 12 lead ECG is to detect ST elevation…

…ECG 1 . Sinus rhythm interrupted by ventricular tachycardia (VT). ECG 2 . Spontaneous termination of ventricular tachycardia (VT). ECG 3 . A single ventricular beat, followed by…

…first. Procedure Choice of insertion site The left lower quadrant is the first choice : the abdominal wall is thinner there than on the right, and…

…with a ventricular arrhythmia without return of spontaneous circulation within 15 minutes, were included. At 30 days, 20% of those in the extracorporeal CPR group…

…hyperpolarisation and contributes to spontaneous diastolic depolarisation. By inhibiting the intracellular portion of its transmembrane pore, ivabradine reduces the slope of diastolic depolarisation and produces…

…Polymorphic ventricular tachycardia. ECG 3 . Spontaneous termination of the ventricular tachycardia. ECG 4 . Recurrence and spontaneous termination of ventricular tachycardia. ECG 5 . Polymorphic ventricular tachycardia…

…affects the effectiveness of the interventions. Numerous studies demonstrate that the available interventions are time sensitive, and to maximize the likelihood of restoring spontaneous circulation…

…acute dizziness with spontaneous nystagmus: consider HINTS plus, but only if the examiner is trained. Brief attacks triggered by the position of the head relative…

…of chest compressions. Identifying return of spontaneous circulation (ROSC). Prognostication. Potential reasons for a flat ETCO2 curve include: Ventilator or capnograph not activated. Displacement of…

…Hemodynamically, the gold standard definition of HFpEF relies on the demonstration of spontaneous or provokable elevated left ventricular (LV) filling pressures, defined invasively as a…

…These cells are capable of spontaneous depolarization (i.e they display automaticity) and can therefore act as latent pacemakers (which become active when atrial impulses…

…electrodes are placed proximally on the thighs and arm electrodes are placed proximally on the upper arm. Placement of chest (precordial) electrodes are not changed…

…all other causes have been ruled out. Inappropriate sinus tachycardia is presumably more common than previously thought and the condition may hamper the quality of…

…sinus rhythm without spontaneous breathing, passive leg raising with an increase in stroke volume 10%, or inferior vena cava variability . In the absence of responsiveness…

…The test presupposes that the patient has spontaneous nystagmus at the time of examination and that the examiner is experienced with the head impulse test…

…8/min, or an increasing level of sedation , are signs of overdose. Sedation precedes respiratory depression; monitor it. Naloxone is titrated to spontaneous breathing, not…

…no meaningful response to speech) after the return of spontaneous circulation , whether the arrest occurred in or out of hospital and whatever the initial rhythm…

…or VT <30 seconds terminated by therapy. Non sustained VT (NSVT) : VT with ≥3 beats and spontaneous termination. Classification according to morphology: Monomorphic VT : VT…

…may extend to the arms, shoulders, neck, jaw, upper back, abdomen, or epigastrium. Dyspnoea, nausea, vomiting, diaphoresis, fatigue, faintness, and other symptoms may occur without…

…particularly if spontaneous or diuretic induced, but it is absent in most diagnosed patients. Reliance on hypokalaemia alone therefore misses a substantial proportion of cases…

…absence of obstructive disease generally indicates a more favourable course than VA accompanied by severe fixed lesions. Nevertheless, patients who develop serious arrhythmias during spontaneous…

…or VT <30 seconds terminated by therapy. Non sustained VT (NSVT) : VT with ≥3 beats and spontaneous termination. Classification according to morphology: Monomorphic VT : VT…

…result, pupils often dilate widely within 30–120 seconds of cardiac arrest and light reactivity is lost when cerebral blood flow ceases. In other words…

…The inhibition of pacing is appropriate when there is intrinsic cardiac activity; the presence of spontaneous atrial or ventricular activity should inhibit pacing in the…

…pulmonary disease (COPD) Bronchospasm (asthma) Other : Coma Central hypoventilation syndromes Neuromuscular diseases Anemia The natural course of asphyxia Should ventilation be entirely inhibited (as seen…

…This is due to the diminished efficacy of these interventions at low temperatures. Additionally, the return of spontaneous circulation (ROSC) is typically not sustained at…

…is responsible for the spontaneous repetitive depolarization. The depolarization spreads from the sinoatrial node to the atrial and ventricular myocardium. Propagation of the action potential…

…a persistent foramen ovale (PFO), which enables blood flow from the right to the left atrium. Echocardiography is of importance for cardioembolic stroke, cryptogenic stroke…

…following survival estimates: Likelihood of return of spontaneous circulation (ROSC) was 29.7% (95% CI 27.6–31.7%) Likelihood of survival to hospital admission…

…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…

…aortic pressure and low right atrial pressure favor coronary blood flow. A CPP of approximately ≥ 15 mmHg is required to induce spontaneous electrical activity in…

…sinus rhythm. A brief run of polymorphic ventricular tachycardia (VT) occurs after the 4th beat. The VT terminates spontaneously after a few beats, and reoccurs…

…compression. The reason compression nevertheless so often fails is that it is done wrongly: the patient pinches the nasal bone instead of the soft part…

…with multiple ventricular premature beats) spontaneously converting to Torsade de Pointes ventricular tachycardia. Notice how arterial blood pressure (ABP) drops at the onset of TdP…

…completely relieved and ST segment elevation is completely normalized spontaneously or after nitroglycerin administration (provided there is no recurrence of symptoms or ST segment elevation)…

…right atrium (Figure 1). The sinus node is composed of highly specialized cells that have a unique ability to spontaneously depolarize. Thus, the cells of…

…e. the ability to depolarize spontaneously). These structures are as follows: The sinoatrial (SA) node: the sinoatrial node is the primary pacemaker of the heart…

…bundles of myocytes that form the slow conducting isthmuses critical for re entry [6] . Non ischemic dilated cardiomyopathy (NICM), hypertrophic cardiomyopathy (HCM), and arrhythmogenic right…

…favorable prognosis, as compared with other forms of ventricular tachycardia. Mechanisms of ventricular tachycardia Ventricular tachycardia (VT) may emerge due to increased/abnormal automaticity, re…