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Multiple Cardiac Arrhythmias Detected by a Dual Chamber
Multiple Cardiac Arrhythmias Detected by a Dual Chamber

... and ventricular arrhythmias. Atrial fibrillation occurs in 10-15% of patients with HOCM11. The sudden onset of any supraventricular tachycardia can be associated with hypotension, which may precipitate syncope and potentially lead to ventricular arrhythmias and sudden cardiac death. This is more pre ...
AAFP Board Review: Managing Dysrhythmias
AAFP Board Review: Managing Dysrhythmias

... The EKG shown represents torsades de pointes. This special form of ventricular tachyarrhythmia is often regarded as an intermediary between ventricular tachycardia and ventricular fibrillation. Morphologically it is characterized by wide QRS complexes with apices that are sometimes positive and some ...
ecg-arryhthmias
ecg-arryhthmias

... P wave & P-R interval • The P wave represents the wave of depolarization that spreads from the SA node throughout the atria, and is usually 0.08 to 0.1 seconds (80-100 ms) in duration. The brief isoelectric (zero voltage) period after the P wave represents the time in which the impulse is travelin ...
managing disease together
managing disease together

... ejection fraction less than or equal to 35% and a prolonged QRS duration to maintain synchrony of the left and right ventricles in patients who have undergone an AV nodal ablation for chronic (permanent) atrial fibrillation and have NYHA Class II or III heart failure. Contraindications: Contraindica ...
PowerPoint Presentation - Weber State University
PowerPoint Presentation - Weber State University

... Electrophysiology ...
Antiarrhythmic Drugs (continued)
Antiarrhythmic Drugs (continued)

... • Adverse reactions (too many to list) occur in about 70% of patients, sufficient to cause discontinuation in 5-20%. ...
Simulating the beating human heart Advanced Cardiac Mechanics
Simulating the beating human heart Advanced Cardiac Mechanics

... • The heart is mainly composed of muscles, a physiological meaningful fiber organization and material  Derivation of a material law for passive and active behavior of the cardiac tissue  Modeling the interaction of excitation and contraction of muscle fibers law for contraction is required.  Calc ...
2. antiarrhythmic drugs
2. antiarrhythmic drugs

... They only have minor effects on the duration of action potential and refractoriness They reduce automaticity by increasing the threshold potential rather than decreasing the slope of ...
PV Why Study Cardiovascular Pressure
PV Why Study Cardiovascular Pressure

... “Physiologists, and in particular physician physiologists, have often fallen into the trap of measuring certain cardiovascular parameters to explain cardiac performance because they could be measured, rather than because they should be measured.” William J. Mazzei, M.D 1998 Scientists have historica ...
Cardiomyopathy and anaesthesia
Cardiomyopathy and anaesthesia

... demand. Hypertension should be treated with b-blockade after ensuring adequate analgesia and anaesthesia. Vasodilator agents, such as GTN, should be avoided. Postoperative management aims to avoid sympathetic stimulation by providing good pain control and avoidance of hypothermia. Regional anaesthes ...
Robust Detection of Premature Ventricular
Robust Detection of Premature Ventricular

... detection of CVD and the determination of the underlying etiology of the disease for prevention and treatment is therefore a crucial task. Identifying premature ventricular contractions (PVCs) in Holter recordings or during monitoring is of particular interest. PVCs result from irritated ectopic foc ...
Clinical and cellular markers of diabetic nephropathy
Clinical and cellular markers of diabetic nephropathy

... current, increase threshold (dec automaticity) Indirect inhibition of L type Ca2+ channels (slow conduction in AVN) ...
PDF - Revista Colombiana de Anestesiología
PDF - Revista Colombiana de Anestesiología

... and corneal reflexes. Although the patient was somnolent, he responded to verbal and pain stimuli. The patient had a Glasgow score of 15/15 at three days, and ischemic hypoxic encephalitis was ruled out. The patient stayed in the ICU for one month until complete recovery of the effects from total bo ...
Pediatric Ventricular Fibrillation Pulseless Ventricular Tachycardia
Pediatric Ventricular Fibrillation Pulseless Ventricular Tachycardia

... · Airway is a more important intervention in pediatric arrests. This should be accomplished quickly with BVM or supraglottic device. Patient survival is often dependent on proper ventilation and oxygenation / Airway Interventions · In order to be successful in pediatric arrests, a cause must be iden ...
Topics in Toxicology 2007
Topics in Toxicology 2007

... “Our experiments suggest that the danger of injecting calcium into the digitalized patient is simply that of injecting calcium into any patient with cardiac disease . . . certainly this danger cannot be great in practice, considering the widespread use of calcium intravenously. . .” Smith PK: Arch I ...
Drug Information Sheet("Kusuri-no-Shiori") Internal Revised: 10
Drug Information Sheet("Kusuri-no-Shiori") Internal Revised: 10

... ・For paroxysmal atrial fibrillation and paroxysmal atrial flutter: In general, for adults, start to take 1 tablet (100 mg of the active ingredient) daily. If the effect is insufficient, the dosage is increased up to 2 tablets (200 mg) daily to take in 2 divided doses. The dosage may be decreased acc ...
Electrocardiogram
Electrocardiogram

... • Chaotic atrial dysrhythmia; atrial rate can be 350+ bpm • Higher ventricular response = cardiac output • Treatment: ...
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...  An estimated 3 million people in the United States have AF8.  AF is a condition that involves an irregular quivering or rapid heart rhythm in the upper chambers (atria) of the heart, and patients with AF are five times more likely to have a stroke9 and three times more likely to have heart failur ...
Understanding atrial fibrillation: A historical perspective
Understanding atrial fibrillation: A historical perspective

... Scotsman and general practitioner Sir James Mackenzie was determined to unravel the mystery [1]. After the unexpected death during childbirth of one of his patients due to a rhythm disorder and congestive heart failure he could not help but ask himself “Would this death have occurred if I had better ...
Antiarrhythmic pharmacotherapy
Antiarrhythmic pharmacotherapy

... - give a slow bolus of 5-10 mg IV over about 5 minutes, while monitoring BP constantly. Works best with an arterial line. Ventricular tachycardia in a conscious patient: - give sotalol IV, 1.5mg/kg (so, about 100mg for a normal-sized person) - then, prepare for elective cardioversion. If its not wor ...
Cardiac Arrhythmia
Cardiac Arrhythmia

... •Increase in threshold for excitation also decreases automaticity •Can also inhibit DAD/EAD •Delays conduction so can block re-entry ...
AED pre read Handout
AED pre read Handout

... ventricles no longer pump effectively. This can be due to a variety of reasons. When the sino-atrial node stops firing the ventricles usually begin to quiver in a rapid unorganized rhythm that is incapable of actually pumping any blood out of the heart. This appears as ventricular fibrillation. This ...
Promote Accel™
Promote Accel™

... exacerbation of heart failure, extrusion, fibrotic tissue growth, fluid accumulation, hematoma formation, histotoxic reactions, infection, keloid formation, myocardial irritability, nerve damage, pneumothorax, thromboemboli, venous occlusion. Other possible adverse effects include mortality due to: co ...
Atrioventricular node ablation: patient monitoring and pacing rate
Atrioventricular node ablation: patient monitoring and pacing rate

... cardiac catheteterization procedure, ventricular lead dislocation in a newly pacemaker-dependent patient, inappropriate pacing on T wave with the device, direct pro-arrhythmic effects of LV pacing itself (see below),1 and finally torsades de pointes due to a bradycardia-dependent prolongation in the ...
Myocardial biopsy in diagnosis of endomyo - Heart
Myocardial biopsy in diagnosis of endomyo - Heart

... consistent with 'congestive cardiomyopathy'. Thus, the study shows that the Q wave pattern on the electrocardiogram provides insufficient evidence for the diagnosis of myocardial infarction, and may be misleading in patients with cardiomyopathy. In such circumstances, endomyocardial biopsy from the ...
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Ventricular fibrillation



Ventricular fibrillation (V-fib or VF) is a condition in which there is uncoordinated contraction of the cardiac muscle of the ventricles in the heart, making them quiver rather than contract properly. Ventricular fibrillation is the most commonly identified arrhythmia in cardiac arrest patients. While there is some activity, the lay person is usually unable to detect it by palpating (feeling) the major pulse points of the carotid and femoral arteries. Such an arrhythmia is only confirmed by electrocardiography. Ventricular fibrillation is a medical emergency that requires prompt Advanced Life Support interventions. If this arrhythmia continues for more than a few seconds, it will likely degenerate further into asystole (""flatline""). This condition results in cardiogenic shock and cessation of effective blood circulation. As a consequence, sudden cardiac death (SCD) will result in a matter of minutes. If the patient is not revived after a sufficient period (within roughly 5 minutes at room temperature), the patient could sustain irreversible brain damage and possibly become brain-dead, due to the effects of cerebral hypoxia. On the other hand, death often occurs if sinus rhythm is not restored within 90 seconds of the onset of VF, especially if it has degenerated further into asystole.
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