…and perirectal Often larger than it appears; risk of fistula Surgeon, often operative management Breast Cosmesis, milk ducts, malignancy differential Surgeon or mammography Sole of…

…fewer than 5% of otherwise normal angiograms demonstrate bridging. The wide range reflects differences in ascertainment and imaging technique. Coronary fistulae represent abnormal communications between…

…Figure 1. Sinus arrhythmia (respiratory sinus arrhythmia). Treatment of sinus arrhythmia Sinus arrhythmia is a normal finding among young and healthy individuals. It is generally…

…severity and situational dependence of sinus bradycardia. If sinus bradycardia is likely due to drug side effects, it is necessary to weigh the risk of…

…node and the atrium). All these conditions have been discussed in detail in the previous articles. Hence, sinus node dysfunction may manifest with any of…

Arrhythmias and arrhythmology ECG Sinus rhythm: the normal rhythm of the heart A rhythm is defined as three consecutive heartbeats with identical waveforms on the…

…are as follows: Normal (physiologic) sinus tachycardia: The automaticity (rate of spontaneous depolarization) in the sinoatrial node is increased during physical activity, stress, and nervousness…

…Adam Stokes attack . Causes of sinoatrial arrest/pause High vagal tone is benign and the most common cause of sinus arrest/pause. It commonly affects…

[calc_aorta] Sinus of Valsalva (SOV) and Aortic Root Assessment The sinus of Valsalva diameter (SOVd) is a critical measurement in evaluating aortic root morphology…

CPR ECG 1 . Sinus rhythm interrupted by ventricular tachycardia (VT). ECG 2 . Spontaneous termination of ventricular tachycardia (VT). ECG 3 . A single ventricular beat, followed…

CPR ECG 1 . Sinus rhythm interrupted by polymorphic VT. ECG 2 . Polymorphic VT. ECG 3 . Polymorphic VT progresses to ventricular fibrillation (VF). ECG 4 . Polymorphic…

Referensvärden The normal values below apply to adults in sinus rhythm, recorded at a paper speed of 50 mm/s with 1 mV = 10…

…evaluation of the severity of native valvular regurgitation with two dimensional and Doppler echocardiography. In Journal of the American Society of Echocardiography : official publication of…

…conversion to sinus rhythm is not successful, blood pressure and ECG should be observed for an additional 15 minutes after the completion of the infusion…

…more often than sinus node involvement, and atrioventricular block (AVB) may indicate septal involvement in the inflammatory process. A broad spectrum of pharmacologic agents can…

…to restore sinus rhythm by use of antiarrhythmic drugs. Randomized controlled trials have not demonstrated any clear difference in mortality when comparing rate and rhythm…

…the leads, which are guided to the right atrial and ventricular myocardium via a vein (Figure 1). Figure 1. Components of a pacemaker. The pacemaker…

…Recurrence of supraventricular complexes (red arrows). ECG 11 . Relapse of VF and new shock. ECG 12 . Sinus rhythm. ECG 13 . Recurring VT. ECG 14 . Sinus…

…Male Age : 62 years History : Coronary bypass grafting; history of arrhythmias. Medications : beta blockers ECG 1 . Sinus rhythm interrupted by ventricular tachycardia (VT). ECG 3 …

…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…

…Isolated sinus bradycardia in the early hours following infarction may be associated with hemodynamic compromise. More broadly, bradyarrhythmic arrest and asystole represent severe manifestations of…

…sinus rhythm and a heart rate above 70 beats/min. The reduction in the combined outcome of cardiovascular death or heart failure hospitalisation was related…

…lead II during sinus rhythm. This is rather easy to understand because lead II is angled alongside the P wave vector, and the exploring electrode…

…during sinus rhythm. A brief run of polymorphic ventricular tachycardia (VT) occurs after the 4th beat. The VT terminates spontaneously after a few beats, and…

…Is there a P wave in front of every ventricular complex? Normal values and differential diagnoses In sinus rhythm the rate is 50–100/min…

…sick sinus syndrome or high grade AV block without pacemaker protection. Asthma and other marked obstructive airways disease — relative; the risk of bronchospasm is real…

…maximum of 3 mg . Doses below 0.5 mg can paradoxically worsen the bradycardia and must be avoided. Atropine acts on the sinus node and…

…prolongation and torsade de pointes reported to the FDA in postmarketing studies. Anti androgen Cancer (Prostate) Abiraterone is an antiandrogen used in the treatment of…

…interval can cause serious arrhythmias and sudden cardiac death. QT prolongation can precipitate torsades de pointes, a specific form of polymorphic ventricular tachycardia characterized by…

…or a high degree of heart block. In patients with severe mental illness (SMI) receiving antipsychotic therapy, sinus tachycardia is common, and symptoms may reflect…

…the sinus and atrioventricular (AV) nodes. In addition to these direct effects, adenosine antagonizes catecholamine stimulated adenylate cyclase. This inhibition decreases the accumulation of cyclic…

…and a higher risk of complications than patients without AF; both short and long term prognosis are worse than in patients who remain in sinus…

…Diagnostics Electrocardiography and Electrophysiology Electrocardiographic evaluation of patients receiving digoxin reveals specific electrophysiologic profiles. Digoxin's autonomic actions largely slow the sinus node discharge rate…

…In the absence of symptoms, heart rates ≥30 beats/min are considered normal in highly trained athletes. Sinus rhythm should resume and bradycardia should resolve…

…rarely causes conversion to sinus rhythm. Biomarkers and Laboratory Findings Renal function biomarkers are essential in the evaluation and ongoing management of patients on sotalol…

…sinus bradycardia, though transient atrioventricular (AV) block can also occur. The physiologic response to orthostatic stress is incompletely understood, but redistribution of blood volume and…

…to sinus rhythm is required. The rationale for electrical therapy over drugs is that, under monitored conditions, a controlled "dose" of electricity can immediately and…

…and asystole can all occur in one patient. The typical depiction of sudden cardiac death as a gradual transition from sinus rhythm to ventricular tachycardia…

Arrhythmias and arrhythmology ECG Chronotropic incompetence: inability to adequately increase heart rate Chronotropic incompetence is an independent predictor of overall and cardiovascular mortality. The condition…

…tachyarrhythmia. Except for sinus tachycardia during physical activity, all tachycardias should be considered pathological and the task is to clarify the cause of the tachycardia…

…Absence of known mutations defines the condition as idiopathic dilated cardiomyopathy . Echocardiography in dilated cardiomyopathy (DCM) In dilated cardiomyopathy (DCM), both ventricles are dilated and…

…Cardioversion of atrial fibrillation in patients without structural heart disease (reduced left ventricular function is considered a structural heart disease). AVNRT, AVRT (WPW syndrome) and…

…All degrees of AV block. Sinus node dysfunction and tach brady syndrome. Ventricular tachycardia, ventricular fibrillation and torsade de pointes. Hypocalcemia Causes of hypocalcemia Acute…

…waves in leads aVF and III. Discrete ST segment depressions in leads V5 V6. ECG example 6. Sinus rhythm, rapid progression of R waves 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…

…combination of tachyarrhythmia and sinus node dysfunction is referred to as tachy brady syndrome . Neurocardiogenic syndrome (which includes vasovagal syncope), as well as carotid sinus…

…volumes of blood before the ventricles begin contracting. To coordinate these two tasks, the heart has an intrinsic pacemaker–i.e. the sinus node–and…

…crista terminalis , the entrance of the coronary sinus and the inferior vena cava, as well as cells around the mitral and tricuspid valves, which possess…

…third degree AV block, sinus node dysfunction without a pacemaker, systolic blood pressure below 90 mmHg, and known hypersensitivity to the agent. Aminophylline is the…

…direction and thus generate a negative (retrograde) P wave (Figure 2). Thus, the P wave morphology of premature atrial beats differs from the sinus P…

…discharged in the ventricles it will spread partly or entirely outside of the conduction system and thus produce a wide QRS complex (QRS duration ≥0…

…of the pulmonary valve and, subsequently, narrowing of the valvular orifice. Carcinoid heart disease may also lead to endocardial fibrosis. Rheumatic heart disease Sinus of…

…the onset of atrial depolarization is prolonged. As seen in Figure 1 this merely entails that the distance between the sinus impulse and P wave…

…excellent, with the vast majority of patients recovering completely after restoration of sinus rhythm (or any other rhythm with normal ventricular rate and activation). Recovery…

…Recurrence of supraventricular complexes (red arrows). ECG 11 . Relapse of VF and new shock. ECG 12 . Sinus rhythm. ECG 13 . Ventricular tachycardia. ECG 14 . Sinus…

…PE) ↓ ↑ ↑ ↓ Vital signs and measures of perfusion Parameter Normal Comment : : : Heart rate 50–100/min MAP 70–105 mmHg Target ≥ 65…

…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…

…due to sinus pause or post VPC pause) results in augmentation of early afterdpolarization amplitude (typically seen with large T wave amplitude), and QT prolongation…

…pathophysiology and impaired ventricular relaxation [10]. There is also an increased risk of intracardiac thrombus and stroke or systemic embolization, even in patients in sinus…

…can refine interpretation. Coronary plaque and future events Angiographic stenosis severity is an imperfect predictor of future myocardial infarction or sudden death. Lesions causing only…