Chronic Atrial Fibrillation - American Academy of Family Physicians
... effective than digoxin for controlling symptoms of chronic atrial fibrillation, but very few trials have been done. When a beta blocker alone is ineffective, current consensus supports the addition of digoxin. Current consensus is that calcium channel blockers are more effective than digoxin for con ...
... effective than digoxin for controlling symptoms of chronic atrial fibrillation, but very few trials have been done. When a beta blocker alone is ineffective, current consensus supports the addition of digoxin. Current consensus is that calcium channel blockers are more effective than digoxin for con ...
Response of recurrent sustained ventricular tachycardia to verapamil
... tachycardia. Circulation 1972; 46: 216-26. current,8 the involvement of slow response action 7 Cranefield PF, Aronson RS. Initiation of sustained potentials is likely. Slow response action potentials rhythmic activity by single propagated action potentials were found in infarcted human myocardium,9 ...
... tachycardia. Circulation 1972; 46: 216-26. current,8 the involvement of slow response action 7 Cranefield PF, Aronson RS. Initiation of sustained potentials is likely. Slow response action potentials rhythmic activity by single propagated action potentials were found in infarcted human myocardium,9 ...
EKG - Birdville High School
... into the ventricles ▪ Step Three: The signal reaches the A-V node. There, the signal pauses very briefly to give the ventricles time to fill with blood. ▪ This delay is seen as the PR interval ▪ Step Four: The signal spreads through the His-Purkinje system. This makes the ventricles contract, pushin ...
... into the ventricles ▪ Step Three: The signal reaches the A-V node. There, the signal pauses very briefly to give the ventricles time to fill with blood. ▪ This delay is seen as the PR interval ▪ Step Four: The signal spreads through the His-Purkinje system. This makes the ventricles contract, pushin ...
Endurance Exercise – Is It Worth It?
... speculate that the increased risk for afib is related to enhanced vagal tone, atrial enlargement, and left ventricular hypertrophy.[8] Medical researchers at the University of Barcelona have found that men who engage in vigorous physical exercise of many years have an increased risk of developing lo ...
... speculate that the increased risk for afib is related to enhanced vagal tone, atrial enlargement, and left ventricular hypertrophy.[8] Medical researchers at the University of Barcelona have found that men who engage in vigorous physical exercise of many years have an increased risk of developing lo ...
AED Information for Staff
... button. After the shock is delivered, the device begins to monitor the heart rhythm again, to determine if another shock is necessary. ...
... button. After the shock is delivered, the device begins to monitor the heart rhythm again, to determine if another shock is necessary. ...
Successful catheter ablation of ventricular
... Ventricular tachycardia (VT) may cause sudden death late after repair of congenital heart disease. Radiofrequency catheter ablation (CA) of VT can be effective but may be hampered by hypertrophied myocardium or prosthetic material. A 33-year-old man with congenitally corrected transposition of the g ...
... Ventricular tachycardia (VT) may cause sudden death late after repair of congenital heart disease. Radiofrequency catheter ablation (CA) of VT can be effective but may be hampered by hypertrophied myocardium or prosthetic material. A 33-year-old man with congenitally corrected transposition of the g ...
Ventricular Tachycardia
... • Causes transient AV block • Interrupts SVT, if AV node is part of the reentry circuit ...
... • Causes transient AV block • Interrupts SVT, if AV node is part of the reentry circuit ...
Evaluation of Left Ventricle Systolic and Diastolic
... patients (32). However, patients with high pulmonary artery pressure were excluded in our study, and thus it could not have had a confounding effect on our interpretations. One of the limitations of this study is our small sample size. The absence of a control group from our patients to compare our ...
... patients (32). However, patients with high pulmonary artery pressure were excluded in our study, and thus it could not have had a confounding effect on our interpretations. One of the limitations of this study is our small sample size. The absence of a control group from our patients to compare our ...
AICD and Pacemaker Update
... is a portion of the heart with a more rapid rate than the sinus node. •Also occurs when transmission from the SA node to A-V node is blocked (A-V block). •During sudden onset of A-V block, sinus node impulses do not get through, and next fastest area of discharge becomes pacemaker of heart beat. •De ...
... is a portion of the heart with a more rapid rate than the sinus node. •Also occurs when transmission from the SA node to A-V node is blocked (A-V block). •During sudden onset of A-V block, sinus node impulses do not get through, and next fastest area of discharge becomes pacemaker of heart beat. •De ...
Arrythmias and EKGs
... AF is the most common sustained arrhythmia. It is marked by disorganized, rapid, and irregular atrial activation. The ventricular response to the rapid atrial activation is also irregular. In the untreated patient, the ventricular rate also tends to be rapid and is entirely dependent on the conduct ...
... AF is the most common sustained arrhythmia. It is marked by disorganized, rapid, and irregular atrial activation. The ventricular response to the rapid atrial activation is also irregular. In the untreated patient, the ventricular rate also tends to be rapid and is entirely dependent on the conduct ...
Surgical myocardial revascularization of patients with
... of 29%, ranging from 9% to 35%), we show in-hospital mortality lower than 4% and a 4-year survival close to 90%, in agreement with the current literature. About 49% and 59% of our patients had, respectively, prior percutaneous transluminal coronary angioplasty and myocardial infarction. These data s ...
... of 29%, ranging from 9% to 35%), we show in-hospital mortality lower than 4% and a 4-year survival close to 90%, in agreement with the current literature. About 49% and 59% of our patients had, respectively, prior percutaneous transluminal coronary angioplasty and myocardial infarction. These data s ...
Beginning 12 Lead ECG Workshop - California Association for
... deflection following the P wave, before the R wave. R WAVE: first positive deflection following the P wave. A second positive deflection is R prime (R’). S WAVE: The second negative deflection following the P wave, or the first negative deflection after the R wave. ...
... deflection following the P wave, before the R wave. R WAVE: first positive deflection following the P wave. A second positive deflection is R prime (R’). S WAVE: The second negative deflection following the P wave, or the first negative deflection after the R wave. ...
Sudden cardiac death: role of heart rate
... variability in predicting arrhythmic deaths [9,17,19,22– 29]. Information obtained by this type of studies may have practical importance, but the study designs are also confounded by some biases, which prevent generalisation of the results. A major limitation is the problem of defining the occurrenc ...
... variability in predicting arrhythmic deaths [9,17,19,22– 29]. Information obtained by this type of studies may have practical importance, but the study designs are also confounded by some biases, which prevent generalisation of the results. A major limitation is the problem of defining the occurrenc ...
modification of ventricular gallop rhythm induced by - Heart
... The patients observed in this study have recorded diastolic sounds satisfying the criteria for a ventricular (protodiastolic, rapid ventricular filling) gallop (Wolferth and Margolies, 1933). All were patients with serious cardiovascular disease and most had evidence of congestive heart failure. Fro ...
... The patients observed in this study have recorded diastolic sounds satisfying the criteria for a ventricular (protodiastolic, rapid ventricular filling) gallop (Wolferth and Margolies, 1933). All were patients with serious cardiovascular disease and most had evidence of congestive heart failure. Fro ...
The Relationship between Serum Sodium Concentration and Atrial
... and 70% of them are between the ages of 65-85 years (13). Benjamin et al. (12) found that men have a 1.5 greater risk for the development of AF when compared to women. In addition, previous studies emphasized that prevalence of AF in men was more than that of women (11). The mean age of the patients ...
... and 70% of them are between the ages of 65-85 years (13). Benjamin et al. (12) found that men have a 1.5 greater risk for the development of AF when compared to women. In addition, previous studies emphasized that prevalence of AF in men was more than that of women (11). The mean age of the patients ...
Pause-dependent polymorphic ventricular tachycardia
... Torsade de pointes has been well recognized early in treatment with dofetilide (15–18,20). However, as with other drugs, the incidence of this problem during long-term treatment is unknown. In a double-blind, placebocontrolled study in patients with ICDs, dofetilide did not affect the time to first ...
... Torsade de pointes has been well recognized early in treatment with dofetilide (15–18,20). However, as with other drugs, the incidence of this problem during long-term treatment is unknown. In a double-blind, placebocontrolled study in patients with ICDs, dofetilide did not affect the time to first ...
Rhythm or rate control in persistent atrial fibrillation
... can be as incapacitating as structural heart disease. However, symptoms associated with persistent atrial fibrillation are more often related to rapid ventricular rates, and there exists good evidence, particularly in the atrioventricular nodal ablation data [9] that rate control can be quite effect ...
... can be as incapacitating as structural heart disease. However, symptoms associated with persistent atrial fibrillation are more often related to rapid ventricular rates, and there exists good evidence, particularly in the atrioventricular nodal ablation data [9] that rate control can be quite effect ...
Ventricular performance before and after fontan repair for
... subjects. other variables were similar tu preoperative observ&xx. Comparison ofpreoperative and postoperative studies indicated a significant reduction in heart rate and time to peak filling rate; other variables were unchanped. Similar observations were obtained in IO patients in whom paired preope ...
... subjects. other variables were similar tu preoperative observ&xx. Comparison ofpreoperative and postoperative studies indicated a significant reduction in heart rate and time to peak filling rate; other variables were unchanped. Similar observations were obtained in IO patients in whom paired preope ...
Sympathetic Nervous System Activation and Left Ventricular
... of populations of intervention studies without comparison with healthy controls. In their study published in this issue of the HJC, Özel et al6 investigated the relationship between SNS overactivity and left ventricular hypertrophy in resistant hypertension and found greater SNS activity in patients ...
... of populations of intervention studies without comparison with healthy controls. In their study published in this issue of the HJC, Özel et al6 investigated the relationship between SNS overactivity and left ventricular hypertrophy in resistant hypertension and found greater SNS activity in patients ...
Slide 1
... -- Classification -• Paroxysmal AF – duration less than 7 days and may be recurrent • Persistent AF – fails to self-terminate; duration greater than 7 days; can be terminated by cardioversion • Permanent AF – duration more than 1 year; cardioversion either failed or has not been attempted • “Lone” A ...
... -- Classification -• Paroxysmal AF – duration less than 7 days and may be recurrent • Persistent AF – fails to self-terminate; duration greater than 7 days; can be terminated by cardioversion • Permanent AF – duration more than 1 year; cardioversion either failed or has not been attempted • “Lone” A ...
New Surgical Technique of Left Ventricular Free Wall Rupture
... farct myocardium; and suture of the tear continuously with the healthy myocardium after attaching a large patch to the outer wall of the infarct myocardium, including the tear. However, hemostasis is difficult to achieve because the infarcted myocardium should also be sutured to directly close the t ...
... farct myocardium; and suture of the tear continuously with the healthy myocardium after attaching a large patch to the outer wall of the infarct myocardium, including the tear. However, hemostasis is difficult to achieve because the infarcted myocardium should also be sutured to directly close the t ...
Influence of right ventricular pacing on right ventricular systolic
... of this study is, that the RV function was not evaluated before the implantation (4). Evaluation of the RV function: Even though RV has more complex anatomy and kinetics, parameters TAPSE and TASV are easy to obtain, and have a very good reliability and reproducibility. The use of TAPSE as a paramet ...
... of this study is, that the RV function was not evaluated before the implantation (4). Evaluation of the RV function: Even though RV has more complex anatomy and kinetics, parameters TAPSE and TASV are easy to obtain, and have a very good reliability and reproducibility. The use of TAPSE as a paramet ...
Management of Atrial Fibrillation in Pregnancy
... adrenergic receptors sensitivity; also the blood volume and the cardiac output increase; this results in myocardial stretch and an increase in cardiac end diastolic volumes. Moreover the augmented sinus heart rate may cause altered myocardial refractoriness, potentially setting up or stabilizing re- ...
... adrenergic receptors sensitivity; also the blood volume and the cardiac output increase; this results in myocardial stretch and an increase in cardiac end diastolic volumes. Moreover the augmented sinus heart rate may cause altered myocardial refractoriness, potentially setting up or stabilizing re- ...
12_cardio tox
... possibility of cardiac drug overdose. Hypotension and unconsciousness are the second and third most common signs. Much of propranolol's toxicity derives from its lipophilic nature and membrane-stabilizing effect that allow it to penetrate the CNS, leading to obtundation, respiratory depression, and ...
... possibility of cardiac drug overdose. Hypotension and unconsciousness are the second and third most common signs. Much of propranolol's toxicity derives from its lipophilic nature and membrane-stabilizing effect that allow it to penetrate the CNS, leading to obtundation, respiratory depression, and ...
Current treatment of ventricular arrhythmias: State of
... the electrophysiology laboratory and immediately record any spontaneous arrhythmias so that they can potentially be used to guide pace mapping if the arrhythmia becomes quiescent. Although pace mapping can be used to guide ablation, it is less accurate than activation mapping.7 In the periaortic reg ...
... the electrophysiology laboratory and immediately record any spontaneous arrhythmias so that they can potentially be used to guide pace mapping if the arrhythmia becomes quiescent. Although pace mapping can be used to guide ablation, it is less accurate than activation mapping.7 In the periaortic reg ...
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.