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

…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…

…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…

…lead to ventricular dilation. However, the term dilated cardiomyopathy (DCM) refers to idiopathic or genetic dilation of the left ventricle . Patients with DCM typically develop…

…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…

…the left ventricle hypertrophic? Is left ventricular ejection fraction (LVEF) normal? A normal sized ventricle with hyperdynamic contractility suggests acute aortic regurgitation. The severity of…

…the left atrial appendage (LAA). The LAA is a highly trabeculated, windsock like embryonic remnant that exhibits uniquely low flow velocities during the loss of…

…Rheumatic heart disease. Dilatation of the right ventricle. Dilatation of the right atrium. Pulmonary hypertension. Left to right shunt. Right ventricular dysfunction due to pressure…

…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…

…the reason for which remains elusive. Gene mutations can be confirmed in roughly 60% of individuals with ARVC. Mutations in the desmosomal gene PKP2 is…

…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…

…hypertension and atherosclerotic coronary disease In patients with heavy alcohol use, left ventricular dilation may precede the development of increased left ventricular hypertrophy and mass…

…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…

…third vector: the ventricular free wall The vectors resulting from activation of the ventricular free walls is directed to the left and downwards ( Figure 7 )…

…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…

…of left ventricular diastolic function Methods for evaluating left ventricular diastolic function have evolved considerably in the past two decades. Currently recommended methods evaluate left…

…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…

…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…

…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…

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

…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…

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

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

…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…

…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…

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…

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

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

…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…

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

…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…

…therapies have failed. Patients with structural heart disease or reduced left ventricular function are not eligible. Effects of propafenone and flecainide on ECG, heart rhythm…

…of patients with suspected ST segment elevation myocardial infarction to a percutaneous coronary intervention capable hospital. The initial ECG should be interpreted in conjunction with…

…nearly empty). In patients with an initial shockable rhythm, compressions and ventilation can extend the duration of the shockable rhythm by several minutes, allowing for…

…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…

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

…syringes, a three way tap. A Seldinger set with a guidewire, a dilator and a 5–8 F pigtail catheter , plus a drainage bag. Sample…

…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…

…by dense collagenous scar, interspersed with surviving bundles of myocytes that form the slow conducting isthmuses critical for re entry [6] . Non ischemic dilated cardiomyopathy…

…safe in patients with coronary artery disease since it does not increase heart rate, and reduces myocardial oxygen consumption. Time to onset of action: 5…

…prognosis in patients with suspected or established coronary artery disease (CAD). It combines echocardiographic assessment of left ventricular (LV) structure and function with exercise or…

…the left atrial appendage, although competing mechanisms such as large artery atherosclerosis and small vessel disease may also contribute to stroke in patients with AF…

…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…

…in patients with reduced left ventricular ejection fraction (LVEF). They are also recommended in patients within one year of MI and in those with LVEF…

…contraindicated, for example in asthma Contraindicated in impaired left ventricular function and together with an intravenous beta blocker Digoxin In heart failure or hypotension, or…

…is then reserved for patients with a CHA₂DS₂ VA score of 0–1. Check what applies in your own region. Duration above the threshold or…

…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…

…with a worse prognosis. VA may occur in the presence of obstructive coronary artery disease (CAD), in non obstructive coronary arteries, or in patients with…

…circumflex artery before a 60 minute occlusion of the left anterior descending coronary artery (LAD) would reduce the infarct size by 60%, as compared with…

…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…

…left ventricular systolic function is depressed or preserved Whether hypotension is present Whether an accessory pathway is suspected, particularly before administration of digoxin The duration…

…and initiation of renal replacement therapy. The study found no significant differences between the two treatment groups with respect to either the primary or secondary…

…30 days if left untreated. Moreover, the pathophysiology of NSTEMI and unstable angina is very similar: both are due to partial (incomplete) coronary artery occlusions …

…Figure 1. Flowchart of Brugada's algorithm for distinguishing ventricular tachycardia (VT) from supraventricular tachycardia (SVT) with wide QRS complex. Brugada's algorithm If there…

…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…