ECG Hypertrophy and dilatation Biventricular hypertrophy Simultaneous hypertrophy of the left and right ventricle is rather common. The ECG has low sensitivity with respect to…

…circulation. • May cause reflex sympathetic stimulation (can be counteracted with simultaneous administration of beta blockers). Effects Induces arteriolar vasodilation without effects on venous circulation. The…

…by aortic or mitral disease (most commonly mitral stenosis). Simultaneous tricuspid regurgitation is also common. Echocardiography Echocardiography has replaced catheterization for the assessment of tricuspid…

…the use of ultrasound throughout the puncture, and maintaining maximal barrier precautions without shortcuts. The most common serious error is dilating a vessel that turns…

…major haemorrhage protocol early. Protocols improve above all the logistics, the communication and the simultaneous delivery of red cells, plasma and platelets. Observational data from…

…rebound hypertension. Withdraw slowly. • Simultaneous use of tricyclic antidepressants reduces the effect of clonidine. • Clonidine increases the CNS depressive effects of alcohol and sedatives. Clonidine…

…contrast is considered causally responsible. This distinction is important because AKI after a contrast study frequently occurs in patients with several simultaneous renal insults. Infection…

…increases cardiac output, and lowers pulmonary artery pressure without increasing myocardial oxygen consumption. The inotropic effect of levosimendan is not affected by the concurrent use…

…originate from the atria but the QRS complexes become wide due to abnormal ventricular depolarization (e.g sinus tachycardia with simultaneous left bundle branch block)…

…Patient selection Aspirin should not be prescribed routinely to individuals without established ASCVD. Selection requires simultaneous consideration of: Estimated cardiovascular risk Baseline bleeding risk Age…

…T wave inversions, without simultaneous ST segment deviation, indicate acute (ongoing) myocardial ischemia. T wave inversions without simultaneous ST segment deviation are not ischemic! However…

…from the atria but the QRS complexes become wide due to abnormal ventricular depolarization (e.g. sinus tachycardia with simultaneous left bundle branch block). 2…

CPR Each recording presents two leads recorded simultaneously. Sex : Female Age : 72 years History : heart failure Medications : digoxin, quinidine ECG 1 . The initial beats are…

CPR Each recording presents two leads recorded simultaneously. Sex : Male Age : 43 years History : None Medications : None ECG 1 . Sinus rhythm interrupted by rapid ventricular…

…increases. This results in increased left ventricular load, while simultaneously affecting systemic perfusion. Aortic stenosis is a serious condition with poor long term outcomes. Patients…

…must be activated rapidly and sequentially. Rapid activation is important in order to activate as much myocardium simultaneously as possible; the more myocardium contracting at…

…of permanent neuronal injury increases. Treatment must therefore start at 5 minutes and be escalated without unnecessary pauses [1]. The aims are, simultaneously, to: 1…

…ischaemia. Thus, a patient may have acute myocardial injury without having an infarction. The degree of troponin elevation does not by itself establish the mechanism…

…sensitisation. This process is achieved via calcium dependent binding to troponin C during systole. Simultaneously, levosimendan activates vascular smooth muscle potassium channels to produce vasodilation…

…Doppler), which is explained by the fact that the pulse repetition frequency (PRF) is reduced when obtaining both a 2D image and Doppler signals simultaneously…

…Figure 1 A ). The plateau phase has a long duration which enables the majority of the ventricular myocardium to contract simultaneously. Since the membrane potential…

…to be activated rapidly and sequentially. Rapid activation is important in order to activate as much myocardium simultaneously as possible; the more myocardium contracting at…

…orientation. As explained below, this enables the ventricle to contract in several directions simultaneously. The subendocardium is the muscle layer closest to the endocardium. The…

…the high density of gap junctions. This rapid transmission ensures that the majority of the ventricular myocardium depolarizes nearly simultaneously, which is crucial for maximizing…

…therapy) may also cause tachycardias, and these devices produce slightly narrower QRS complexes (because they stimulate both ventricles simultaneously). A tachycardia with Q wave or…

…from the transducer is colored blue. The advantage of color tissue Doppler is that all myocardium is analyzed simultaneously, which makes it possible to compare…

…Unlike ventricular tachycardia, ventricular fibrillation seldom self terminates and death is imminent without immediate and resuscitative efforts. https://ecgwaves.com/course/sudden cardiac arrest and…

…causes immense strain on the ventricular myocardium, simultaneously as the cause of the arrhythmia already affects cellular function. This results in electrical instability which explains…

…Duplicate therapy. Check that the patient is not simultaneously on a DOAC, low molecular weight heparin and an antiplatelet agent without an indication. Interactions: strong…

…In acute blood loss, plasma and red cells are lost simultaneously, which means the haemoglobin can be normal before fluid has redistributed or been given…

…effect of probenecid. Avoid combination. Ibuprofen: May inhibit the antiplatelet effect of low dose acetylsalicylic acid when taken simultaneously. Clinical significance is unclear. Metamizole: May…

…point depression). The reason for such electrical potential difference is that not all ventricular myocardial cells will finish their action potential simultaneously. Myocardial cells which…

…of fixed coronary disease. More than one mechanism may operate simultaneously. Some acute coronary events occur without an identifiable culprit thrombus. NSTE ACS generally reflects…

…in so called side lobes (Figures 5A and 5B). Ultrasound energy in side lobes is mostly dissipated in the tissue without generating significant reflections. However…

…not visible in most cases, because it is hidden within the QRS complex (the atria and the ventricles are activated simultaneously, but ventricular potentials dominate…

…Impulse conduction through the Purkinje network is very fast (4 m/s) which enables the vast majority of ventricular myocardium to be depolarized approximately simultaneously…

…are discharged from the junctional area, atria and ventricles are depolarized simultaneously and ventricular depolarization (QRS) dominates the ECG. If the atria are activated prior…

…RBBB and LBBB. Electrophysiology of right bundle branch block (RBBB) Under normal conditions, both ventricles depolarize simultaneously. However, the QRS morphology is dominated by electrical…

…or pulmonic stenosis. Heart rate . Synchronicity : Optimal contraction requires the majority of all ventricular myocardium to contract simultaneously. For this to be possible, the right…

ECG Myocardial ischemia and infarction ST elevation myocardial infarction (STEMI) without ST segment elevations on 12 lead ECG This chapter covers situations in which the…

…the sequence of activation of the piezoelectric crystals (Figure 3). By activating all crystals simultaneously, the resulting sound wave travels in a straight direction (Figure…