…presence of troponin elevation, ACS are classified into unstable angina (UA), non ST segment elevation myocardial infarction (NSTEMI), and ST segment elevation myocardial infarction (STEMI…

…Subsequent chapters will deal with ST segment elevation myocardial infarction (STEMI) and non ST segment elevation myocardial infarction (Non STEMI, NSTEMI) in detail. Although myocardial…

…ST elevation myocardial infarction) . When elevated troponin levels are confirmed in patients with NSTE ACS, the condition is classified as NSTEMI (Non ST elevation myocardial…

…large epidemiological analysis, mechanical complications occurred in approximately 0.27% of STEMI cases and 0.06% of non ST elevation myocardial infarction cases. Despite their…

…Non ST Elevation Myocardial Infarction (NSTEMI) and Unstable Angina (UA) The focus of this chapter is the diagnosis and management of patients with Non ST…

…such as prior infarction, left bundle branch block, Wolff–Parkinson–White patterns or ventricular pacing STEMI and non ST segment elevation myocardial infarction (NSTEMI) are…

Myocardial ischemia and infarction Definition and pathophysiological context Non ST segment elevation myocardial infarction (NSTEMI) is considered within the spectrum of non ST elevation acute…

…myocardial infarction (STEMI), non ST elevation ACS (NSTE ACS), or ACS complicated by cardiogenic shock. In NSTE ACS, a strategy involving coronary angiography and subsequent…

…introduce the most common and essential terms used in resuscitation science, providing a foundation for understanding subsequent chapters. SCA (Sudden Cardiac Arrest) : Sudden and unexpected…

…electrocardiogram (ECG), which predisposes the myocardium to a specific form of polymorphic ventricular tachycardia (VT) known as torsades de pointes (TdP). Drug induced LQTS and…

…presumed non ischaemic chest pain were subsequently found to have had an infarction. Pathophysiological Considerations The central pathophysiological concern in the emergency department is myocardial…

…Hypertension is a major component of this burden, followed by non HDL cholesterol. For myocardial infarction, the leading contributors include high non HDL cholesterol, hypertension…

…leading to marked heat generation, acidosis, and the subsequent development of hyperkalemia. This condition is potentially fatal and necessitates prompt intervention, including sedation and the…

…highlight a shifting demographic profile in incident HFrEF. Historically dominated by acute myocardial infarction (MI) survivors, the contemporary risk factor profile is increasingly driven by…

…implantation. Beta blockers, particularly non selective agents like nadolol and propranolol, are the first line treatment for reducing arrhythmic risk across all LQTS genotypes. These…

…implantation. Beta blockers, particularly non selective agents like nadolol and propranolol, are the first line treatment for reducing arrhythmic risk across all LQTS genotypes. These…

…athletes have large ventricular dimensions and often lower ejection fraction, as compared with non athletes. This is explained by the fact that the athlete's…

…managed as a non traumatic cardiac arrest (i.e. standard CPR, as per guidelines). Contusio cordis Contusio cordis refers to a contusion of the myocardium…

…and third degree AV blocks. Readers already familiar with the basics of AV blocks can proceed directly to the subsequent chapters, which provide detailed discussions…

…infarction (MI) is absent. Heart failure (HF) symptoms may result from several overlapping processes: Recurrent or extensive MI with necrosis and scar formation Diffuse myocardial…

…fms like tyrosine kinase 1/placental growth factor ratio ≥40 is associated with increased risk of preeclampsia with severe features during the subsequent two weeks…

…and diabetes [1]. Although TdP and subsequent sudden death are rare, the arrhythmia is precipitated by an extensive list of "torsadegenic" or "QT liability" drugs…

…An overview of available methods follows. Each method is discussed in detail in subsequent chapters. Stroke volume (SV) Stroke volume is the volume of blood…

…QRS complexes and altered QRS appearance. These concepts will be discussed in detail in this and the subsequent articles. Note that the terms intraventricular conduction…

…in subsequent chapters. The first part consists of a brief rehearsal of the basics of cardiac automaticity, action potentials, and pacemaker cells. Principles of myocardial…

…of arrhythmias) is presented in this chapter, followed by in depth discussions of specific arrhythmias in subsequent chapters. Cardiac arrhythmias can be subdivided into the…

…the third leading cardiovascular cause of death worldwide. Only stroke and acute myocardial infarction are more common. It is estimated that 10 million cases of…

…Relapse of VF and new shock. ECG 12 . Sinus rhythm. ECG 13 . Recurring VT. ECG 14 . Sinus rhythm, with ST segment elevations not seen previously.

…defibrillation (when possible) are the strongest determinants of survival in cardiac arrest. All subsequent actions require trained professionals (e.g endotracheal intubation, mechanical chest compressions…

…5. Flush the cannula. Discard the first few millilitres at the subsequent samplings so that residual drug does not contaminate the sample. 6. Take cortisol…

…when typical ischaemic symptoms occur without persistent ST segment elevation, accompanied by a rise and subsequent fall in cardiac specific troponin attributable to myocardial ischaemia…

…lung, fat, and skin, with myocardial concentrations reaching 10 to 50 times those found in plasma. Plasma clearance is low, renal excretion is negligible, and…

…classification, remains incompletely established. Data concerning premature menopause and subsequent hypertension or diabetes are insufficient to support firm conclusions. Systemic inflammatory and autoimmune diseases, including…

Myocardial ischemia and infarction Definition and Pathophysiology Intravascular imaging comprises catheter based techniques that directly visualize the coronary lumen, vessel wall, plaque, thrombus, and implanted…

…This distinction is clinically important because cardiac troponin elevation after revascularization is common and may reflect procedural myocardial injury rather than a clinically significant infarction…

…the action potential to contractile cells. The subsequent spread of the action potential occur from one contractile cell to another, starting in the endocardium and…

…prolonged and then shortened. The initial prolongation increases the length of the refractory period and the subsequent early impulse will therefore encounter refractory fibers. Thus…

ECG Stimulation threshold As previously discussed, myocardium may be excited by external electrical stimuli that drive the cells to threshold. Stimulation threshold is the minimum…

…Sinus rhythm, with ST segment elevations not seen previously. ECG Case 2: Ventricular tachycardia progressing to ventricular fibrillation Below are sequential ECG recordings during a…

…threshold will evoke an action potential, which will subsequently propagate to neighboring cells and ultimately depolarize all connected myocardium. This is the main principle behind…

…more recent analyses question whether this reflects true biological protection. Potentially favourable associations with myocardial infarction may coexist with adverse effects on stroke, heart failure…

…5] . Unlike HFrEF, where epicardial ischemic heart disease and myocardial infarction are primary drivers, HFpEF is more frequently associated with coronary microvascular dysfunction, though epicardial…

…function. Myocardial ischemia occurs when there is insufficient oxygen available. Insufficient oxygen supply results in diminished ATP production and subsequently disruption of cellular metabolism. In…

…next sinus impulse. The premature impulse may depolarize the atria and subsequently, the ventricles, provided that the myocardium and conduction system have repolarized. This appears…

…In the heart, this can lead to thickening of the pulmonary valve and, subsequently, narrowing of the valvular orifice. Carcinoid heart disease may also lead…

…leads. Localization of myocardial infarction / ischemia is done by using ECG changes to determine the affected area and subsequently the occluded coronary artery (culprit). Figure…

…significant stenosis. Tricuspid stenosis results in increased right atrial pressure, which subsequently causes right atrial dilation. Vena cava inferior may also dilate secondarily. Principles of…

…near the bundle of His, the impulse may be delivered to both bundle branches and subsequently the entire ventricular myocardium normally. This may yield a…

…pulse deficits, or visceral ischaemia. Approximately 25% of PAUs are discovered incidentally on imaging, although an incidental lesion may subsequently become symptomatic or progress. The

…refractory pathway, as shown in Figure 1 . The impulse may subsequently circulate within the atrioventricular node, as long as it encounters excitable tissue. As it…

…As a result, the electrical currents produced by the myocardium are transmitted through the body to the skin, where they can be detected using electrodes…

…leads. Localization of myocardial infarction / ischemia is done by using ECG changes to determine the affected area and subsequently the occluded coronary artery (culprit). Figure…

…means that the machine emits ultrasound waves with a certain frequency and subsequently records reflected sound waves at double the frequency of the emitted waves…

…subsequently lower blood pressure and reduced organ perfusion. Left ventricular dilation occurs with ensuing decline inleft ventricular ejection fraction (LVEF). This is accompanied by myocardial…