…right shunt, tamponade, or sudden loss of effective cardiac output. Their recognition is essential because treatment often requires urgent surgical or transcatheter intervention, with temporary…

…occurs in more than 90% of patients presenting with the syndrome. Its severity and temporal pattern vary considerably. Symptoms of systemic venous congestion include: Peripheral…

…filling. The impulse then travels through the Bundle of His, which bifurcates into the left bundle branch (LBB) and the right bundle branch (RBB). The…

…may understate the possibility of ischaemia. A focused history should establish: Quality of the discomfort. Location and radiation. Onset and temporal pattern. Duration and recurrence…

…other ECG changes (see below) should lead to a suspicion of ARVC. The gradual loss of myocardium leads to ventricular dilation and right heart failure…

…It should be noted that imaging of the right ventricle requires an experienced echocardiographer. Three dimensional (3D) echocardiography should be considered in laboratories with expertise…

…right ventricular outflow tract) become dilated, which further agravates the regurgitation. The proximal portion of the pulmonary artery may also be dilated in patients with…

…in increased intramural pressure in the right ventricle, which is counteracted by dilatation of the ventricle. Dilatation of the right ventricle results in reduced intraventricular…

…LCX or the right coronary artery (RCA). For details, refer to chapter The Coronary Arteries. Mitral valve disease A wide range of conditions may cause…

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

…10 mL with sodium chloride) before intravenous titration. Half of all opioid dosing errors arise at the dilution step, and an undiluted syringe of 10…

…7 ). The explanation for this is as follows: The vector resulting from activation of the right ventricle does not come to expression , because it is…

…with the right atrium being depolarized before the left atrium. The first half of the P wave is therefore a reflection of right atrial activation…

…showing left and right ventricular hypertrophy. Next chapter Biventricular Hypertrophy Related chapters Overview of Hypertrophy and Dilatation Left Ventricular Hypertrophy Atrial Hypertrophy and Dilatation (P…

…left ventricular enlargement, right ventricular enlargement and atrial enlargement. Below follows a discussion on the principles and differences of dilatation and hypertrophy, as well as…

…The hallmark of both RBBB and LBBB is the QRS duration which is by definition 120 ms or longer. ECG criteria for right bundle branch…

…Reperfusion therapy Management Recommendation Level of evidence Reperfusion is indicated in all patients with symptoms of ischaemia of <12 h duration and persistent ST segment…

…system (His Purkinje network), which results in rapid impulse transmission and thus shorter QRS duration (as compared with apical pacing). Because ventricular pacing results in…

…with time, clarity and respect is also what makes the decision hold afterwards. Organ preserving treatment — treatment given solely for the sake of the donation…

…to optimize the effectiveness of CPR. Yet, there are fundamental gaps in knowledge, with some of the most critical components of current guidelines being based…

…than the right ventricle, the QRS complex is actually a reflection of the electrical potentials generated by the left ventricle. QRS duration QRS duration is…

…No flow time : The duration (minutes) from circulatory collapse to initiation of CPR. During no flow there is no cerebral perfusion and brain damage progresses…

…III and aVF (with QRS duration <0.12 seconds), provided that other causes of right axis deviation have been excluded. Causes of left axis deviation…

…III and aVF (with QRS duration <0.12 seconds), provided that other causes of right axis deviation have been excluded. Causes of left axis deviation…

…the vector generated by the right ventricle, the QRS complex is actually a reflection of left ventricular depolarization. QRS duration is the time interval from…

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…

…for females) C: Incomplete Right Bundle Branch Block (rSR' pattern in lead V1 and qRS pattern in V6 with QRS duration <120 ms) D: Profound…

…ECG signs of left atrial enlargement 3 Left axis deviation 2 QRS duration ≥90 milliseconds 1 Prolonged R wave peak time: V1 V2 (right ventricle…

…not interfere with ongoing CPR or airway management, no risk of pneumothorax Highest risk of thrombosis and contamination, immobilises the patient The right internal jugular…

…filled normally, there is more room for the right ventricle, the filling of which increases and the septum bulges into the left ventricle. During exhalation…

…in mitral and tricuspid inflow The echocardiographic counterpart of pulsus paradoxus Contraindications In overt tamponade with shock there are no absolute contraindications other than the…

…connected devices. Additional breakthroughs have been achieved in recent years, with the leadless pacemaker being the most promising improvement. 1 Given the wide use of…

…its duration, morphology, and hemodynamic consequences, which collectively dictate the urgency and modality of intervention [3] . By Duration: Non sustained VT (NSVT): Defined as three…

…These require a QRS duration exceeding 140 msec in males and 130 msec in females , along with slurring or notching of the mid QRS in…

…in the AV node is high grade. Causes of tachyarrhythmia with narrow QRS complexes (QRS duration < 0.12 s): sinus tachycardia, inappropriate sinus tachycardia…

…delay is defined as “a QRS duration greater than 110 ms in adults, greater than 90 ms in children 8 to 16 years of age…

…duration of the pulse must be optimized to ensure depolarization while minimizing battery consumption. Amplitudes are normally below 1.5 V and pulse duration (width…

…associated thrombosis. Warfarin in antiphospholipid syndrome and in marked renal failure. Duration of treatment: at least 3 months. Extended treatment in unprovoked pulmonary embolism, a…

…water soluble and short acting, not a depot preparation, and gives a shorter duration of effect. Lidocaine 10 mg/mL without adrenaline , 2–5 mL…

…Type 1 Brugada syndrome reminds somewhat of right bundle branch block (RBBB) in leads V1–V3, but the QRS duration is not prolonged in leads…

…Flowchart of Brugada's algorithm for distinguishing ventricular tachycardia (VT) from supraventricular tachycardia (SVT) with wide QRS complex. Brugada's algorithm If there is no…

…in persons who are otherwise healthy. The majority of those with LAFB, however, have significant heart disease. Myocardial infarction, coronary artery disease, left ventricular hypertrophy…

…displacement, annular dilatation, or both; progressive ventricular remodeling may also occur in primary valvular disease. Increasing severity of mitral regurgitation is associated with worse outcomes…

…QRS duration ≥0.12 s) if there is a left or right bundle branch block. Commonly, the premature atrial impulse arrives before one of the…

…that the test failed to identify 27.8% of individuals with poor neurological recovery. The specificity of absent pupillary reflex for predicting a poor neurological…

…there is significant stenosis ( 75% luminal obstruction) of the left main coronary artery (LAD) or 2 epicardial coronary arteries (Felker et al). Left ventricular dilation…

…help determine expected normal values based on body surface area (BSA), aiding in the diagnosis of aortic root dilation. Key Formulas BSA Calculation (Mosteller formula): [ …

…prolapse of P2 (Figure 1). Myocardial ischemia affecting the papillary muscles or the connected myocardium may cause mitral prolapse, and thus regurgitation. Ischemia manifests with…

…with left ventricular dilation. This type of cardiomyopathy, referred to as tachycardia induced cardiomyopathy , can be caused by any tachyarrhythmia leading to prolonged periods of…

…the contraction of smooth muscle cells. As compared with nitroprusside, nicardipine induces relatively greater venodilation than arteriolar dilation. Effects Nicardipine causes dilation of the coronary…

…profound driver of global cardiovascular morbidity and mortality, primarily due to its association with ischemic stroke and systemic embolism. The contemporary understanding of AF has…

…because cardiac output diminishes in parallel with increasing myocardial load (and hence oxygen demand). The most common causes of acute aortic regurgitation are aortic dissection…

…the contraction of smooth muscle cells. As compared with nitroprusside, nicardipine induces relatively greater venodilation than arteriolar dilation. Effects Nicardipine causes dilation of the coronary…

…the contraction of smooth muscle cells. As compared with nitroprusside, nicardipine induces relatively greater venodilation than arteriolar dilation. Effects Nicardipine causes dilation of the coronary…

…sustained heavy consumption is associated with hypertension, coronary artery disease, arrhythmias, heart failure and alcohol related cardiomyopathy. The cardiovascular implications of lower alcohol intake remain…

…a precaution. Dosage of vernakalant Vernakalant is dosed by body weight, with the maximum dose based upon 113 kg. Normal dilution: 4 mg/ml. Recommended…

…must go home with an adrenaline auto injector and written instructions. Patients taking beta blockers may respond poorly to adrenaline. If there is no response…

…and of ventricular end diastolic and residual volumes. Experimental and clinical observations with a precordial dilution technic. Circulation. Redfield et al: Heart Failure with Preserved…

…reference to the intravenous antihypertensive drugs used in a hypertensive emergency. It summarises the mechanism of action, the onset, the duration of effect, the dosing…

…for calculating corrected QT duration (QTc). QT correction according to Bazett , Fridericia , Framingham and Hodges follow in the calculator below. Open the calculator → Normal…