…flow across the mitral valve. The duration of diastasis is inversely related to heart rate (diastasis is shorter at higher heart rates and vice versa ).

…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): [ …

…right heart hypertrophy, dilation and ultimately right heart failure. Echocardiography in mitral stenosis Echocardiographic assessment of mitral stenosis includes visual and 2D imaging, as well…

…cava and the descending aorta. During a cardiac arrest, the venous and arterial pressures are substantially reduced, potentially leading to complete obstruction of venous return…

…ventricle, which is counteracted by dilatation of the ventricle. Dilatation of the right ventricle results in reduced intraventricular pressure and thereby reduced myoardial load. Pulmonary…

…cycle repeatedly to the circumflex artery before a 60 minute occlusion of the left anterior descending coronary artery (LAD) would reduce the infarct size by…

…depending on e.g the type of pacemaker, intrinsic cardiac activity, etc. The cardinal manifestation of pacing on surface ECG is the stimulation artifact (Figure…

…Dose Duration : : : : Bacterial meningitis, initial therapy (after corticosteroid) cefotaxime plus ampicillin 3 g × 4 IV plus 3 g × 4 IV 7–21 days depending on…

…but, depending on the etiology, may be more or less echogenic. It is important to estimate the volume, echogenicity and location of the effusion. Regarding…

…K + ) channels open which results in cell repolarization. The cycle then repeats itself ( Figure 1 ). Note that the leakage of sodium during the resting phase…

…interval = 60 / HR Validity of QT correction formulas The accuracy of QT correction formulas can vary depending on the heart rate and individual patient…

…complexes (QRS duration ≥0,12 s) : ventricular tachycardia is the most common cause and it is potentially life threatening. Note that 10% of wide complex…

…light causes rapid bilateral pupillary constriction (a brisk reflex), whereas low light causes dilation. This reflex is highly sensitive to brainstem integrity and cerebral perfusion…

…DCM) Dilated cardiomyopathy (DCM) is defined as dilation of one or both ventricles. Dilation of the left ventricle is virtually always accompanied by impaired left…

…to dilation of the mitral annulus and papillary muscle displacement (i.e the distance between the papillary muscle and the mitral annulus increases), both of…

…ventricular tachyarrhythmias (including recurrent episodes of ventricular tachycardia) can also cause this cardiomyopathy. The duration of the tachyarrhythmia appears to be a stronger risk factor…

…Tetralogy of Fallot Marfan syndrome Takayasu's arteritis Iatrogenic (e.g complication of catheterization) Congenital dysplasia/aplasia of the pulmonary valve Idiopathic pulmonary artery dilation…

…Time to onset of action 5 to 15 minutes Duration of action 1.5 to 5 hours Delivery IV Dose 5–15 mg/hour IV…

…and the arrhythmia itself. This remodeling manifests as interstitial fibrosis, atrial dilation, and endocardial denudation, which collectively promote local inflammation and create a highly prothrombotic…

…back to the right atrium and venous system, resulting in dilation of vena cava inferior ( 2.1 cm). Severe tricuspid regurgitation may lead to systolic…

…Table 1. Causes of aortic regurgitation Bicuspid aortic valve Rheumatic heart disease Calcified aortic valves Idiopathic aortic dilatation (aneurysm) Hypertension Aortic dissection, proximal Marfan syndrome…

…inhibitors Enalaprilat Enalaprilat is rarely used in hypertensive crisis due to its slow onset, prolonged duration of effect, and significant individual variations in its effect…

…inhibitors Enalaprilat Enalaprilat is rarely used in hypertensive crisis due to its slow onset, prolonged duration of effect, and significant individual variations in its effect…

…although the exact exposure threshold and duration required are not established. The source material identifies chronic intake of approximately 60 g daily in males and…

…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…

…pressure, which subsequently causes right atrial dilation. Vena cava inferior may also dilate secondarily. Principles of management Medical therapies do not alter disease progression. Diuretics…

…days duration. Vernakalant does not convert atrial flutter to sinus rhythm. Vernakalant is only administered in a monitored clinical setting appropriate for cardioversion. Administration of…

…the dilution step, not in the choice of dose. Paediatric doses are calculated on actual body weight unless otherwise stated. When the weight of a…

…of fraction of left ventricular volume ejected per beat and of ventricular end diastolic and residual volumes. Experimental and clinical observations with a precordial dilution…

…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…

…titration. Half of all opioid dosing errors arise at the dilution step, and an undiluted syringe of 10 mg/mL makes small adjustments impossible. Procedure…

ECG Introduction to ECG interpretation The QRS complex (ventricular complex): normal and abnormal configurations and intervals A complete QRS complex consists of a Q , R…

…From a hemodynamic standpoint, there are two types of enlargement, namely hypertrophy and dilatation. Both hypertrophy and enlargement may reduce atrial and ventricular function as…

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

…is also indicated. Possible shortening of DAPT A duration of 6 months after ACS is generally considered too short for routine use, but it may…

…is also what makes the decision hold afterwards. Organ preserving treatment — treatment given solely for the sake of the donation — may continue for at m

…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…

…reflection of the electrical potentials generated by the left ventricle. QRS duration QRS duration is the time duration from the start to the end of…

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

…VT]). The VF waveform is initially coarse ( i.e fibrillatory waves have large amplitudes) but as the duration of VF is prolonged, the amplitude gradually…

…based interventions. Many tachyarrhythmias carry a potential risk of serious morbidity or mortality, underscoring the need for a structured and guideline directed approach. This chapter…

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

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

…complex is actually a reflection of left ventricular depolarization. QRS duration is the time interval from the onset to the end of the QRS complex…

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…

…a common cause (Figure 1). The duration of the P wave will exceed 120 milliseconds in lead II. Biatrial abnormality/enlargement Biatrial abnormality implies that…

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

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

Enalaprilat Enalaprilat is rarely used in hypertensive crisis due to its slow onset, prolonged duration of effect, and significant individual variations in its effect. Drug…

…QRS is indicative of 'Ventricular pre excitation', and QRS duration ≥140 ms is considered 'Profound nonspecific intra ventricular conduction delay', both of which are not…

…a patient on digoxin treatment 1 ECG signs of left atrial enlargement 3 Left axis deviation 2 QRS duration ≥90 milliseconds 1 Prolonged R wave…

…Time to onset of action 50 to 10 minutes Duration of action 30 to 60 minutes Delivery IV Dose Initial infusion dose: 0.1 μ…

…Time to onset of action 1 to 2 minutes Duration of action 10 to 30 minutes Delivery IV Dose Bolus injection : 5 to 15 mg…

…patients with an initial shockable rhythm, compressions and ventilation can extend the duration of the shockable rhythm by several minutes, allowing for EMS or bystanders…

…on the hand. These are as a rule left open. Facial bites can be sutured after careful debridement because of the cosmesis, often with antibiotic…

…of Cardiology (ESC) guidelines advocate for ICD implantation in high risk LQTS patients, emphasizing a comprehensive risk assessment that includes genetic factors and QTc duration…

…the ventricles at 100 bpm (cycle length: <600 ms). Classification according to duration: Sustained VT : VT 30 seconds, or VT <30 seconds terminated by therapy…

…the ventricles at 100 bpm (cycle length: <600 ms). Classification according to duration: Sustained VT : VT 30 seconds, or VT <30 seconds terminated by therapy…

…from dilating adequately during diastole. This leads to increased and equivalent diastolic pressure in all rooms. Because pressure is high in the atria, filling of…

…become worse. Particularly, the degree of AV block may increase. QRS complex QRS duration becomes prolonged. ST segment ST segment depression may develop. T wave…