…progression in chronic conditions. Post Intervention Monitoring : Assess residual shunts after device closure or surgery. Differentiating Pathologies : Helps differentiate cardiac vs. non cardiac causes of…

…of intermittent infrahisian block should be maintained, particularly in older patients and those exhibiting a bundle branch block (BBB) or an intraventricular conduction defect. In…

Echocardiography Myocardial ischemia and infarction Definition and pathophysiology Post infarction mechanical complications are structural disruptions of acutely infarcted myocardium occurring most often during the first…

…mild defects ( Baumgartner et al ). Approximately 40,000 children are born with CHD annually in the United States ( Triedman et al ). The prevalence of congenital…

…debated intensely in the past decade. A quick search (on Google) for anything related to statins, LDL cholesterol and dietary fat returns thousands of blogs…

…A pot of 4 % formalin, and for immunofluorescence Michel's medium or saline according to local procedure. Photograph and draw in the site before the…

…RBBB) The right bundle branch block mainly affects the terminal portion of the QRS complex, resulting in a second R wave (referred to as R'…

…To address these challenges, researchers have developed ECG criteria designed to identify ischemia in the presence of left bundle branch block. The most widely recognized…

…This results in flow heterogeneity and perfusion defects in areas supplied by the disease artery. Thus, vasodilators replicate the effects of exercise on coronary arteries…

…conduction defects and waveform changes Digoxin may be used in patients with heart failure, atrial fibrillation, atrial flutter, and in selected cases of paroxysmal supraventricular…

…QRS configurations are also indicate of previous myocardial infarction. New conduction defect Myocardial infarction/ischemia may be complicated with conduction defects (discussed in separate article).

…the fact that the Purkinje fibers run through the endocardium. It is likely that conduction defects would have been more common in myocardial ischemia otherwise.

Conduction defects ECG Second degree AV block: ECG criteria, clinical characteristics & management In this chapter, the focus will be on second degree atrioventricular (AV) block…

…vectors to become evident. These vectors manifest in the later part of the QRS complex as an R’ wave (pronounced "R prime"), which is directed…

…blocks (hemiblocks) This chapter discusses intraventricular conduction delays (defects), which are caused by functional or anatomical defects in the components of the intraventricular conduction system…

…peak biomarker levels, compared to those without such conduction defects [12]. Sudden Cardiac Death (SCD) : In patients with a low ejection fraction, syncope is considered…

…a high probability that the block is located bilaterally in the bundle branches. This type of first degree AV block often progresses to third degree…

…ECG examples are given in Figure 1 . Figure 1. Third degree AV block (complete heart block, AV dissociation). Figure 2. Example of third degree AV…

…anterior fascicular block is due to anatomical or functional block in the anterior fascicle. Depolarization of the left ventricle will depend entirely on the posterior…

Conduction defects ECG Left bundle branch block (LBBB) Left bundle branch block (LBBB) results from anatomical or functional impairment of the left bundle branch (LBB…

…50% renal elimination. • Typically the first choice of drug. • Effective in sinus bradycardia or AV node block. • Dose <0.5 mg may worsen bradycardia and…

…conduction defects without any change in their QRS appearance. Such conduction delays may be due to myocardial fibrosis, amyloidosis, cardiomyopathy or hypertrophy. Prognosis of nonspecific…

Conduction defects ECG Atrioventricular block (AV block): definition, causes, diagnosis & management This article covers the fundamental principles of atrioventricular (AV) blocks, which are classified into…

…of color Doppler is that it allows for rapid visualization of flows, velocitites and volumes. This is useful for detecting valvular regurgitation and defects in…

Echocardiography Cardiac thromboembolism Thromboembolism is a leading cause of death worldwide (1). Emboli originating in the atria, left atrial appendage (LAA), ventricles, valves, and proximal…

…defects in all patients,, anginal symptoms in 83%, and ECG changes in all patients. Achieving 70% of age adjusted MHR resulted in perfusion defects in…

…channel blockers (inhibitors). The reader will notice that most of these drugs are contraindicated in patients with structural heart disease, as well as patients with…

…pronounced during stress. RR is characterized by normal or near normal perfusion observed during stress, followed by the appearance of a perfusion defect in rest

…septum defects, etc. Right ventricular load is thus an issue that is raised both in outpatient and emergency care. To evaluate the presence of right…

…due to diminished automaticity (pacemaker function) in the sinoatrial node or conduction defects (e.g. second degree AV block) as a result of ischemia/infarction…

…tachycardia is most often due to atrial fibrillation with wide QRS complexes due to bundle branch blocks or other conduction defects. However, in rare instances…

…arrhythmias, conduction defects Cause of termination This article will discuss each of these six parameters in detail. Symptom during exercise stress testing Perceived exertion The…

…stenoses. Coronary anomalies Coronary artery anomalies are uncommon among the general population but account for a substantial proportion of sudden cardiac death in young athletes…

…Below follows a discussion on the principles and differences of dilatation and hypertrophy, as well as typical ECG changes seen in atrial and ventricular enlargement…

…transposition of the great arteries, pulmonary valve stenosis, atrial septal defect, ventricular septal defect), tricuspid valve regurgitation are the most common causes. ECG changes in…

…An acute phase protein — a normal ferritin does not exclude iron deficiency in the presence of inflammation Transferrin saturation 15–50 % < 15 % indicates iron…

…zone. Coronary Occlusion and Myocardial Injury STEMI generally results from abrupt reduction in coronary blood flow caused by thrombotic occlusion of a previously atherosclerotic artery…

…R waves: R wave ≥0,04 s in V1 V2 and R/S ratio ≥1 with concordant positive T wave in absence of conduction defect…

…cm and compressible in between 2,1 cm, almost not compressible Additional qualitative parameters Mild regurgiation Moderate regurgitation Severe regurgitation Coaptation defect mild moderate severe…

…in selected circumstances, myocardial viability. Both techniques rely on intravenous radiopharmaceuticals that are taken up by myocardial tissue. The distribution of retained tracer provides tomographic…

…Failure to capture Definition : pacing does not result in myocardial activation. Two types of failure to capture should be distinguished: Genuine failure to capture occurs…

…one being refractory and the other capable of conducting the impulse, re entry may arise. This is illustrated in Figure 1 (study this figure carefully…

…given in square metres. Aorta, standardised values Standardised values (mean ± SD) Age Aortic annulus, women Aortic annulus, men Sinuses of Valsalva, women Sinuses of Valsalva…

…cm and compressible in between 2,1 cm, almost not compressible Additional qualitative parameters Mild regurgiation Moderate regurgitation Severe regurgitation Coaptation defect mild moderate severe…

…starting in the endocardium and heading towards the epicardium. As evident from Figure 7 , the vector of the ventricular free wall is directed to the…

…of Native Valvular Regurgitation. A Report from the American Society of Echocardiography Developed in Collaboration with the Society for Cardiovascular Magnetic Resonance. In Journal of…