Abstract:
OBJECTIVES:The goal of this study was to report a variety of atrial tachycardia that might be caused by an unusual electrophysiologic substrate. BACKGROUND:The mechanism of atrial tachycardias is attributed to re-entry, abnormal automaticity or triggered activity, based on their electropharmacological responses. A rate-related and lidocaine-sensitive atrial tachycardia has not been reported. METHODS:Eight patients (3 women and 5 men, aged 14 to 60 years) with repetitive, uniform atrial tachycardias were studied. In six patients the arrhythmia had been refractory to at least three antiarrhythmic agents (class 1A and C sodium channel blockers, amiodarone, beta-adrenergic blocking agents, verapamil, digoxin). Conventional electrocardiograms, Holter recordings and B mode echocardiograms were performed in each patient. Intravenous lidocaine and verapamil were tested in the eight patients. Six patients underwent an electrophysiologic study. RESULTS:The baseline electrocardiogram showed nearly incessant runs of atrial tachycardia in all patients. The mean atrial ectopic cycle length ranged from 376 to 502 ms. In seven patients a progressive prolongation of the cycle length from the beginning to the end of the salvos was documented. The arrhythmia was suppressed by increments of sinus node rate and by atrial pacing at cycle lengths longer than that of the atrial tachycardia. In all patients the arrhythmia was abolished by intravenous lidocaine, whereas intravenous verapamil was ineffective. Four symptomatic patients were successfully treated with radiofrequency ablation of the ectopic focus, and two patients were treated with oral mexiletine. CONCLUSIONS:The peculiar electropharmacological responses of this arrhythmia suggest an uncommon underlying mechanism that remains to be elucidated.
journal_name
J Am Coll Cardioljournal_title
Journal of the American College of Cardiologyauthors
Chiale PA,Franco DA,Selva HO,Militello CA,Elizari MVdoi
10.1016/s0735-1097(00)00906-2subject
Has Abstractpub_date
2000-11-01 00:00:00pages
1637-45issue
5eissn
0735-1097issn
1558-3597pii
S0735-1097(00)00906-2journal_volume
36pub_type
临床试验,杂志文章abstract:OBJECTIVES:This study was undertaken to determine the ability of the signal-averaged electrocardiogram (ECG) to identify evidence of delayed atrial activation in patients with a history of atrial fibrillation. BACKGROUND:Atrial fibrillation is a reentrant rhythm and depends on atrial conduction delay for its developme...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/0735-1097(93)90381-a
更新日期:1993-06-01 00:00:00
abstract:OBJECTIVES:This study was conducted to characterize the functional nature of the reentrant tract responsible for ventricular tachycardia due to ischemic heart disease. BACKGROUND:A zone of slow conduction forming the return path is though to form a critical component of the reentrant mechanism in ventricular tachycard...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/0735-1097(95)00086-j
更新日期:1995-06-01 00:00:00
abstract:OBJECTIVES:The objective of this study was to show elevations in septal shear stress in response to morphologic abnormalities that have been associated with discrete subaortic stenosis (SAS) in children. Combined with the published data, this critical connection supports a four-stage etiology of SAS that is advanced in...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/s0735-1097(97)00048-x
更新日期:1997-07-01 00:00:00
abstract::Cholesteryl ester transfer protein (CETP) facilitates exchange of triglycerides and cholesteryl ester between high-density lipoprotein (HDL) and apolipoprotein B100-containing lipoproteins. Evidence from genetic studies that variants in the CETP gene were associated with higher blood HDL cholesterol, lower low-density...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章,评审
doi:10.1016/j.jacc.2018.10.072
更新日期:2019-02-05 00:00:00
abstract::Patients with chronic heart failure (CHF) have a resting restrictive ventilatory defect. Any type of exercise requires patients with CHF to markedly increase their minute ventilation. Patients with chronic obstructive pulmonary disease (COPD) have airflow obstruction that leads to dynamic lung hyperinflation and reduc...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章,评审
doi:10.1016/j.jacc.2004.03.063
更新日期:2004-08-04 00:00:00
abstract:OBJECTIVES:We sought to test the prognostic performance of thrombus precursor protein (TpP) in patients presenting with an acute coronary syndrome (ACS). BACKGROUND:Because thrombus formation is a critical step in the development of ACS, a measurement of activated coagulation could yield important information. Thrombu...
journal_title:Journal of the American College of Cardiology
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doi:10.1016/j.jacc.2008.01.069
更新日期:2008-06-24 00:00:00
abstract:OBJECTIVES:This study investigated the influences of ventricular morphology, hemodynamics and clinical findings on exercise capacity in patients after the Fontan operation. BACKGROUND:Determinants of exercise capacity after the Fontan operation remain unclear. METHODS:Peak oxygen uptake (PVo2) was determined in 105 p...
journal_title:Journal of the American College of Cardiology
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doi:10.1016/s0735-1097(01)01266-9
更新日期:2001-06-01 00:00:00
abstract:OBJECTIVES:The aim of this study was to determine the incidence and significance of second- or third-degree heart block among patients with inferior myocardial infarction treated with thrombolytic therapy. BACKGROUND:Data from the prethrombolytic era suggest that heart block occurs in approximately 20% of patients wit...
journal_title:Journal of the American College of Cardiology
pub_type: 临床试验,杂志文章,多中心研究,随机对照试验
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更新日期:1992-09-01 00:00:00
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journal_title:Journal of the American College of Cardiology
pub_type: 历史文章,杂志文章
doi:10.1016/s0735-1097(99)00027-3
更新日期:1999-04-01 00:00:00
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journal_title:Journal of the American College of Cardiology
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更新日期:2018-03-06 00:00:00
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doi:10.1016/s0735-1097(03)00231-6
更新日期:2003-04-16 00:00:00
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journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/j.jacc.2018.12.066
更新日期:2019-03-26 00:00:00
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journal_title:Journal of the American College of Cardiology
pub_type: 临床试验,杂志文章,多中心研究
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更新日期:2016-08-30 00:00:00
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journal_title:Journal of the American College of Cardiology
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doi:10.1016/j.jacc.2007.07.093
更新日期:2008-01-29 00:00:00
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journal_title:Journal of the American College of Cardiology
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doi:10.1016/j.jacc.2009.04.080
更新日期:2009-09-08 00:00:00
abstract::The initial and late outcome of coronary angioplasty was studied in 148 patients less than 40 years of age (mean 36.4 +/- 3). Angioplasty was performed on a single vessel in 70% of patients and on multiple vessels in 30%; it was performed on a totally occluded vessel in 20%. Angioplasty was successful in 90.5% of pati...
journal_title:Journal of the American College of Cardiology
pub_type: 临床试验,杂志文章
doi:10.1016/0735-1097(90)90302-6
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journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章,评审
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更新日期:2005-11-01 00:00:00
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journal_title:Journal of the American College of Cardiology
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更新日期:2020-03-24 00:00:00
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journal_title:Journal of the American College of Cardiology
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更新日期:2001-01-01 00:00:00
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journal_title:Journal of the American College of Cardiology
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更新日期:2018-01-02 00:00:00
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journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章,多中心研究
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更新日期:2013-09-03 00:00:00
abstract::To evaluate the influence of left ventricular chamber stiffness and relaxation on Doppler echocardiographic indexes of diastolic function, 35 patients (mean age 60 +/- 12 years) were examined; 24 had coronary artery disease and 11 (Group I) had no cardiovascular disease. Micromanometer left ventricular pressure was re...
journal_title:Journal of the American College of Cardiology
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更新日期:1989-02-01 00:00:00
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journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章,随机对照试验
doi:10.1016/j.jacc.2009.04.053
更新日期:2009-10-20 00:00:00
abstract::The effects of intravenous magnesium on exercise-induced angina were examined in 15 patients with variant angina and in 13 patients with stable effort angina and were compared with those of placebo. Symptom-limited bicycle exercise and thallium-201 myocardial scintigraphy were performed after intravenous administratio...
journal_title:Journal of the American College of Cardiology
pub_type: 临床试验,杂志文章
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更新日期:1988-11-01 00:00:00
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journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/j.jacc.2016.09.946
更新日期:2016-12-20 00:00:00
abstract:OBJECTIVES:The aim of this study was to evaluate the use of a new manual thrombus-aspirating device in unselected patients with ST-segment elevation acute myocardial infarction (STEMI) undergoing urgent percutaneous coronary intervention (PCI). BACKGROUND:Failure to achieve myocardial reperfusion often occurs during P...
journal_title:Journal of the American College of Cardiology
pub_type: 临床试验,杂志文章,随机对照试验
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更新日期:2005-07-19 00:00:00
abstract:OBJECTIVES:The study sought to determine if left internal thoracic artery (LITA) grafting of the left anterior descending (LAD) at reoperative coronary artery bypass grafting (CABG) improves patient outcomes. BACKGROUND:LITA grafting to the LAD is the gold standard for primary CABG, but its value for reoperative CABG ...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/j.jacc.2012.09.045
更新日期:2013-01-22 00:00:00
abstract:OBJECTIVE:The aim of this study was to evaluate the potential of paclitaxel to prevent restenosis in vivo. BACKGROUND:Paclitaxel (Taxol) is a microtubule-stabilizing compound with potent antitumor activity. It influences the cytoskeleton equilibrium by increasing the assembly of altered microtubules, thereby inducing ...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/s0735-1097(00)00614-8
更新日期:2000-06-01 00:00:00