…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…

…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…

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

…patients with Non ST Elevation Myocardial Infarction (NSTEMI) and unstable angina (UA), which are collectively referred to as NSTE ACS (Non ST Elevation Acute Coronary…

…ventricular pacing STEMI and non ST segment elevation myocardial infarction (NSTEMI) are contemporary clinical and electrocardiographic categories. Earlier terms such as Q wave, non Q…

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…

…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…

…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…

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

…majority of cases, it is only possible to determine the ischemic/infarct area (and thus the culprit) if the ECG displays ST segment elevations. However…

…branches and subsequently the entire ventricular myocardium normally. This may yield a ventricular rhythm with narrow QRS complexes. However, this is very uncommon and of…

…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…

…interpreted as cardiac arrest and cardiopulmonary resuscitation should be initiated. Agonal breathing is interpreted as manifest cardiac arrest. Defibrillation : Use of non synchronized electric shock…

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

…arrest. Before the onset of sustained VT, patients frequently experience PVCs and runs of non sustained VT. Sustained episodes of TdP will degenerate to VF…

…are major determinants of subsequent LV deterioration and long term survival. Viable, stunned, and hibernating myocardium Viable dysfunctional myocardium is myocardial tissue whose contractile function…

…severe features during the subsequent two weeks. Cerebral circulatory autoregulation is also disturbed. This helps explain the neurological manifestations of preeclampsia and the potential for…

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

…Instead, the ultrasound system focuses on sound waves with high amplitude and low velocity; these waves are reflected from myocardium. Tissue Doppler can also be…

…and practice of resuscitation medicine. Kitamura T, Kiyohara K, Sakai T, et al. Epidemiology and outcome of adult out of hospital cardiac arrest of non…

…with a subsequent measurement of 40% [14] . This distinction is paramount for practicing cardiologists: HFimpEF represents a state of myocardial remission rather than true recovery…

…myocardium to be depolarized approximately simultaneously. Figure 1 shows the components of the conduction system. Note that conduction defects in the atrioventricular (AV) node and…

…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…

…during normal circumstances and the rhythm is referred to as sinus rhythm . Parts of the atrial myocardium : There are clusters of atrial myocardial cells located…

…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…

…All subsequent actions require trained professionals (e.g endotracheal intubation, mechanical chest compressions, targeted temperature management, etc.) and are much less effective in terms of…

…few millilitres at the subsequent samplings so that residual drug does not contaminate the sample. 6. Take cortisol at 30 minutes and at 60 minutes…

…mg/min for 6 hours, and then 0.5 mg/min for the remaining 18 hours and subsequent days as necessary. Supplemental infusions of 150…

…factors, and whether they improve risk classification, remains incompletely established. Data concerning premature menopause and subsequent hypertension or diabetes are insufficient to support firm conclusions…

…missed myocardial infarction remains consequential, and historically 2–6% of patients discharged with presumed non ischaemic chest pain were subsequently found to have had an…

…and necrotic components. Virtual histology IVUS has also been used to identify thin cap fibroatheroma, a plaque phenotype associated with subsequent major adverse cardiovascular events…

…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…

…this burden, followed by non HDL cholesterol. For myocardial infarction, the leading contributors include high non HDL cholesterol, hypertension, smoking, abdominal obesity, and diabetes. Behavioural…

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

…RR interval is first prolonged and then shortened. The initial prolongation increases the length of the refractory period and the subsequent early impulse will therefore…

…calibrate stimulations according to the excitability of the myocardium. Functions of the pacemaker The functions of a pacemaker depend on the software, hardware, and programming…

…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…

…precede the development of increased left ventricular hypertrophy and mass. Initially, myocardial abnormalities may be subclinical. Progressive dilation can subsequently impair left ventricular ejection fraction…

…has subsequently improved to 40% under guideline directed medical therapy (GDMT). These patients must be managed as having HFrEF, as their underlying pathophysiology, trajectory, and…

…depolarize the atria and subsequently, the ventricles, provided that the myocardium and conduction system have repolarized. This appears as a P wave and QRS complex…

…paraneoplastic syndrome that occurs due to carcinomas secreting kallikrein and serotonin. In the heart, this can lead to thickening of the pulmonary valve and, subsequently…

…and their relation to the ECG leads. Localization of myocardial infarction / ischemia is done by using ECG changes to determine the affected area and subsequently…

…severity. Tricuspid stenosis is visually characterized by thickened leaflets, with reduced motion and potentially fused commisures. Continuous Doppler is used to assess the stenosis. Doppler…

…and LQT3. This model was developed using a single center longitudinal cohort and subsequently validated with an independent cohort of 1,689 patients from the…

…and LQT3. This model was developed using a single center longitudinal cohort and subsequently validated with an independent cohort of 1,689 patients from the…

…Danlos syndrome Inflammatory aortitis, including Takayasu arteritis and giant cell arteritis Bicuspid aortic valve Coarctation of the aorta Previous aortic trauma Pregnancy, particularly the third…

Arrhythmias and arrhythmology ECG Atrioventricular Nodal Reentry (Reentrant) Tachycardia (AVNRT): clinical features, mechanisms, ECG & management Atrioventricular nodal reentrant tachycardia (AVNRT) is a common tachyarrhythmia observed…

…small to be detected by skin electrodes; the ECG presents the electrical activity of the atrial and ventricular myocardium. Automaticity of pacemaker cells The automaticity…

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

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

…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…

…impairs atrial and ventricular filling, such that stroke volumes are severely reduced. Commotio cordis Commotio cordis occurs as a result of a blunt, non penetrating…