…different position or a different vessel. Choice of site Vessel Advantages Disadvantages : : : Internal jugular vein (right) Best ultrasound conditions, a straight course to the superior…

…of the T wave, in leads V1 and V2 (Figure 1). Terminal activation duration (TAD) , defined as the interval between the nadir (lowest point) of…

…ECG tracing lasting ≥30 seconds, characterized by irregularly irregular R R intervals and the absence of distinct P waves [1] [2] . Stroke Risk Scores: CHA2DS2…

…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 ).

…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…

…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…

…PR interval <120 ms with a delta wave and wide QRS is indicative of 'Ventricular pre excitation', and QRS duration ≥140 ms is considered 'Profound…

…reader will notice that most of these drugs are contraindicated in patients with structural heart disease, as well as patients with reduced left ventricular function…

…left bundle branch block). 2. P wave and PR interval Check The P wave is always positive in II, III and aVF. P wave duration…

…complex in V1–V2 resembles a left bundle branch block (i.e negative QRS) V1 : The initial portion of the QRS complex is smooth in…

…QRS complex; (3) the P wave is positive in lead II and (4) the PR interval is constant. Causes of bradycardia : sinus bradycardia, sinoatrial block…

…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…

…QRS complex; (3) the P wave is positive in lead II and (4) the PR interval is constant. Causes of bradycardia : sinus bradycardia, sinoatrial block…

…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…

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…

…the left ventricle partially or entirely outside the specialized conduction system. This slower conduction results in a prolonged QRS duration. The defining features of LBBB…

…in aVL and QRS duration 0,12 s, provided that other causes of left axis deviation have been excluded. Causes of extreme axis deviation Extreme…

…in aVL and QRS duration is 0,12 s, provided that other causes of left axis deviation have been excluded. Causes of extreme axis deviation…

…duration of 3 to 4 days post infusion, thereby providing extended therapeutic benefits. 2 Infusion of levosimendan can be repeated at 2 6 weeks intervals…

…etc. ) may ultimately lead to ventricular dilation. However, the term dilated cardiomyopathy (DCM) refers to idiopathic or genetic dilation of the left ventricle . Patients 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…

…may also lead to left ventricular dilation, which is referred to as ischemic cardiomyopathy (Dilated Cardiomyopathy). Ventricular dilation leads to dilation of the mitral annulus…

…leads to atrial hypertrophy and dilation. Atrial dilation causes a significantly increased risk of atrial fibrillation. The increase in left atrial pressure may also propagate…

…in the left ventricle and left atrium. Chronic aortic regurgitation leads to dilatation and hypertrophy of the left ventricle. Cardiac remodeling Ventricular dilatation and hypertrophy…

…venous system, resulting in dilation of vena cava inferior ( 2.1 cm). Severe tricuspid regurgitation may lead to systolic reversal in the hepatic veins. This…

…in left ventricular preload lead to a cascade of hemodynamic alterations which may culminate in cardiac arrest. Pulmonary embolism is causally related to deep vein…

…prolonged duration of effect, and significant individual variations in its effect. Drug Enalaprilat Brand names Vasotec IV ® Indications Hypertension and hypertensive emergency. Acute left…

…prolonged duration of effect, and significant individual variations in its effect. Drug Enalaprilat Brand names Vasotec IV ® Indications Hypertension and hypertensive emergency. Acute left…

…left ventricular dilation may precede the development of increased left ventricular hypertrophy and mass. Initially, myocardial abnormalities may be subclinical. Progressive dilation can subsequently impair…

…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…

…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…

…The duration of the P wave will exceed 120 milliseconds in lead II. Biatrial abnormality/enlargement Biatrial abnormality implies that the ECG indicates both left…

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

…duration exceeding 140 msec in males and 130 msec in females , along with slurring or notching of the mid QRS in at least two left…

…deviation of the electrical axis. The QRS duration is slightly prolonged but does not reach 0.12 s. Block in the anterior fascicle causes left…

…in left bundle branch block (LBBB), which explains why paced QRS complexes are similar to the QRS morphology during LBBB. Stimulation in other regions of…

…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…

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…

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

…prolonged duration of effect, and significant individual variations in its effect. Drug Enalaprilat Brand names Vasotec IV ® Indications Hypertension and hypertensive emergency. Acute left…

…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…

…and Pathophysiology Posterior myocardial infarction is myocardial necrosis involving the posterior region of the left ventricle, usually as part of an inferoposterior or posterolateral infarction…

…important mechanisms. Diuretics relieve the hemodynamic consequences of congestion by producing a negative sodium and water balance. They can reduce jugular venous pressure, pulmonary congestion…

…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…

…blood flow from the pulmonary vein to the left atrium is hampered. This reduces the filling of the left atrium and, accordingly, the left ventricle…

…lesions can cause acute severe regurgitation, a left to right shunt, tamponade, or sudden loss of effective cardiac output. Their recognition is essential because treatment…

…liver, lung or vessel lies in the path of the needle. Access Puncture site Direction Comment : : : : Subxiphoid 1–2 cm below and to the left

…uterus should be manually displaced to the woman's left side (Figure 1). Additional offloading of the vena cava can be accomplished using a wedge…

…asymptomatic, NSVT serves as a critical marker of arrhythmogenic risk, particularly in the setting of ischemic heart disease or reduced left ventricular ejection fraction (LVEF)…

…Time to onset of action 5 to 10 minutes Duration of action 2 to 4 hours Delivery IV Dose Can be given as repeated intravenous…

…coronary artery disease (CAD). It combines echocardiographic assessment of left ventricular (LV) structure and function with exercise or pharmacological stress. The physiological basis is an…

…clinical patterns of AF—paroxysmal, persistent, long standing persistent and permanent—and is not determined solely by the apparent frequency or duration of documented episodes…

…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…

…uncomplicated acute coronary syndrome when LVEF is 40% is not definitive. Observational studies have yielded conflicting results, and the appropriate duration of therapy in p

…or unknown duration An anticoagulant for at least 3 weeks before cardioversion, or alternatively transoesophageal echocardiography to exclude thrombus After cardioversion, irrespective of duration An…

…can precipitate ventricular fibrillation, and cardioversion of fibrillation of unknown duration without anticoagulation can cause a stroke hours to weeks later. Everything else in the…

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

…vasoconstriction of one or more coronary arteries. Epicardial spasm produces a reversible functional occlusion and usually causes transmural ischaemia. The resulting abnormalities in left ventricular…

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