…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…

…limb ischaemia (ALI) is an abrupt reduction in arterial perfusion of an upper or lower limb that causes tissue metabolic requirements to exceed available blood…

…the dorsum of the foot lateral to the extensor hallucis longus tendon. Measure in the same way as on the arm. 4. Posterior tibial artery …

…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

…pregnant adult of normal weight, and individual assessment. See the separate quick reference for dosing in impaired renal function. Respiratory tract Diagnosis Agent Dose Duration …

…Upper limit 440–460 ms 430–450 ms 450–470 ms Prolonged 460 ms 450 ms 470 ms Table 1 . Reference intervals for QTc duration…

…higher the troponin level and the longer the duration of elevated troponin levels. Differences in absolute concentrations of troponin I and T during acute myocardial…

…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…

…characteristics of angina; many patients report less characteristic symptoms, while others present primarily with exertional dyspnoea. Symptoms should be characterized systematically, including: Onset and duration…

…suggested to calculate corrected QT intervals. Some of these formulas follow: Bazett's formula for calculating corrected QT duration (QTc). Bazett Formula: QTc = QT…

…of the entire QRS duration, which will exceed 120 msec (0.12 sec). PR interval checklist Normal PR interval: 0,12–0,22 seconds. Upper…

…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…

…obstruction) of the left main coronary artery (LAD) or 2 epicardial coronary arteries (Felker et al). Left ventricular dilation entails a markedly elevated risk of…

…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): [ …

…muscle rupture. The risk of rupture is greater for the posteromedial papillary muscle, which only receives blood supply from one coronary artery (Coronary arteries). Chronic…

…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…

…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…

…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…

…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…

…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…

…and prognosis of most cardiac diseases, including coronary artery disease, heart failure, arrhythmias, structural heart disease, etc. Over the years, a large number of parameters…

…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…

…to measure the QT interval Measurement of the QT interval may be difficult due to T wave changes. Causes of prolonged QTc duration Antiarrhythmics (procainamide…

…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…

…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 ).

…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…

…than the base rate should inhibit the pacemaker. P waves The appearance of the P wave depends on where the atrial lead is fixed. Typically…

…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…

…The most common serious error is dilating a vessel that turns out to be an artery — everything in the technique is designed to make sure…

…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…

…artery forceps, a size 15 scalpel. Local anaesthetic, suture material, scissors, dressings. Local anaesthesia Agent Onset Duration Comment : : : : Lidocaine 10 mg/mL Rapid 1–2…

…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…