…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 …

…avoided or considered carefully in: Bite wounds — particularly cat and human bites, and all bites on the hand. These are as a rule left open…

…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…

…and a family history of heart failure, ventricular arrhythmias or sudden cardiac arrest is common. The following cardiomyopathies lead to dilation of the ventricle: Dilated…

…Atrial Fibrillation and Atrial Thromboembolism Atrial fibrillation (AF) is the most common sustained cardiac arrhythmia and a profound driver of global cardiovascular morbidity and mortality…

…ventricle during diastole. The most common cause of abnormal pulmonary regurgitation is pulmonary hypertension. Table 1 presents the causes of pulmonary regurgitation. Mild pulmonary regurgitation…

…ventricle. Dilatation of the right atrium. Pulmonary hypertension. Left to right shunt. Right ventricular dysfunction due to pressure/volume overload is the most common cause…

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

…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…

…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…

…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…

…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…

…lead to a suspicion of ARVC. The gradual loss of myocardium leads to ventricular dilation and right heart failure. Biventricular heart failure is less common…

…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…

…in a special type of heart failure, referred to as heart failure with preserved ejection fraction (HFPEF). HFPEF may be more common than heart failure…

…and this leads to dilatation. The most common cause is valvular regurgitation (insufficiency). For example, aortic regurgitation causes the flow of blood from the aorta…

…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…

…Overview of the normal electrocardiogram (ECG / EKG) Figure 1. The classical ECG curve with its most common waveforms. Important intervals and points of measurement are…

…in order to give the reader firm knowledge of normal findings , normal variants (i.e less common variants of what is considered normal) and pathological…

…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…

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…

…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…

…is very common. Figure 2. Two ECGs showing left and right ventricular hypertrophy. Next chapter Biventricular Hypertrophy Related chapters Overview of Hypertrophy and Dilatation Left…

…mitrale, because mitral valve disease is a common cause (Figure 1). The duration of the P wave will exceed 120 milliseconds in lead II. Biatrial…

…causes of pericarditis can result in constrictive pericarditis. In high income countries, idiopathic pericarditis, radiation to the pericardium and surgical interventions are the most common…

…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…

…volume filling of the chambers. At normal filling volumes, the pericardium is very indulging and thus allows rapid ventricular filling. If the dilatation of the…

…and nicardipine in hypertensive emergencies. Time to onset of action 2 4 minutes Duration of action 5 15 minutes Delivery IV (infusion). Dose Initial dose:…

…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…

…particularly inverted T waves. Below follows a discussion which aims to clarify some of the common misunderstandings. All T waves are illustrated in Figure 18…

…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…

…and less common causes such as severe pre existing valvular disease or excessive beta blocker or calcium channel blocker exposure. The incidence of cardiogenic shock…

…Increased as necessary (increments of 0.5 μg/kg/min). Maximum dose: 8 10 μg/kg/minute. Common maximum dose: 3 μg…

…Whether an accessory pathway is suspected, particularly before administration of digoxin The duration of the AF episode, if known The presence of thromboembolic risk fa

…The population impact of a risk factor depends not only on the relative risk associated with exposure but also on how common the exposure is…

…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…

…of phosphate substitution, use of foscarnet. ECG changes due to hypocalcemia Common ECG changes Lengthened QT interval (torsade de pointes is uncommon) Shortened QRS duration…

…Causes of tachycardia (tachyarrhythmia) with wide QRS complexes (QRS duration ≥0,12 s) : ventricular tachycardia is the most common cause and it is potentially life…

…clinical features, mechanisms, ECG & management Atrioventricular nodal reentrant tachycardia (AVNRT) is a common tachyarrhythmia observed across all age groups, from children to the elderly, and…

…less common. Levosimendan may be administered simultaneously with milrinone. The drugs can also be given sequentially. Hypotension can be counteracted with simultaneous administration of norepinephrine…

…3. QRS duration is <120 ms. Panel B in Figure 5 below shows another example of early repolarization. Readers interested in ST segment elevation differential…

…Hyponatremia of unknown duration : These cases are managed as chronic hyponatremia. Degree of hyponatremia P/S Na + Common effects Mild 130 125 mmol/l Cognitive…

…to the onset of the T wave ( Figure 1 A ). The plateau phase has a long duration which enables the majority of the ventricular myocardium…

…instead of qR complex. The electrical axis will be shifted to the left (left axis deviation), ranging between 45° and 90°. The QRS duration will…

…Causes of tachycardia (tachyarrhythmia) with wide QRS complexes (QRS duration ≥0,12 s) : ventricular tachycardia is the most common cause and it is potentially life…

…equals 200 ms). The hallmark of both RBBB and LBBB is the QRS duration which is by definition 120 ms or longer. ECG criteria for…

…sweat, nausea, etc – are also common in NSTEMI and unstable angina (please refer to Approach to Patients with Chest Pain). As in patients with STEMI…

…Common structural consequences include left ventricular hypertrophy, left atrial enlargement, and abnormalities of diastolic filling. Mitral regurgitation may develop through papillary muscle displacement, annular dilatation…

…inverted). Early repolarization pattern Early repolarization occurs in 5% to 10% of all males. It is less common among women (prevalence 2% to 4%). The…

…QRS duration <0.12 s), because both bundle branches receive the impulse and spread it. If the impulse is discharged distal to the bifurcation of…

…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…

…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): [ …

…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…

…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…

…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…

…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…

…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…