Abstract:
BACKGROUND:QT dispersion (QTd = QTmax-QTmin) measured as interlead variability of QT interval reflects the spatial inhomogeneity of ventricular repolarization times, and increased QTd may provide a substrate for malignant ventricular arrhythmias. Ischemia is associated with regional abnormalities of conduction and repolarization. HYPOTHESIS:This study aimed to investigate the effect of acute ischemia on QTd during successful percutaneous transluminal coronary angioplasty (PTCA). METHODS:Forty-three patients (10 women, 33 men, mean age 56 years) were enrolled in the study. Electrocardiogram (ECG) recordings were taken before PTCA and during balloon inflation period. QT maximum (QTmax), QT minimum (QTmin), and QTd (QTmax-QTmin) values were calculated from the surface ECG. RESULTS:There was no difference among QTmax values (p = 0.6). Mean QTmin during balloon inflation was lower than before PTCA (368 +/- 45 vs. 380 +/- 41 ms, p = 0.002). The difference between QTd values before and during balloon inflation was statistically important (65 +/- 9 vs. 76 +/- 10 ms, p = 0.001). This difference is caused by a decrease in QTmin during balloon inflation. CONCLUSION:Acute reversible myocardial ischemia induced by balloon inflation causes an increase in QTd value, and this increment is the result of a decrease in QTmin interval. Therefore, QTd may be a marker of reversible myocardial ischemia.
journal_name
Clin Cardioljournal_title
Clinical cardiologyauthors
Aytemir K,Bavafa V,Ozer N,Aksoyek S,Oto A,Ozmen Fdoi
10.1002/clc.4960220109subject
Has Abstractpub_date
1999-01-01 00:00:00pages
21-4issue
1eissn
0160-9289issn
1932-8737journal_volume
22pub_type
杂志文章abstract:BACKGROUND:Investigate the usefulness of echocardiography and acoustic cardiography to monitor patients exposed to anthracycline chemotherapy. HYPOTHESIS:Serial echocardiographies to monitor systolic function may not be neccessary in all patients undergoing anthracycline chemotherapy. METHODS:In a prospective study, ...
journal_title:Clinical cardiology
pub_type: 杂志文章
doi:10.1002/clc.22074
更新日期:2013-04-01 00:00:00
abstract:BACKGROUND:Congenital coronary-pulmonary fistulas (CPFs) are commonly unilateral, but bilateral and multilateral fistulas may occur. In multilateral CPFs, the value of a multidetector computed tomography (MDCT) imaging technique as an adjuvant to coronary angiography (CAG) is eminent. The purpose of this study was to d...
journal_title:Clinical cardiology
pub_type: 杂志文章,评审
doi:10.1002/clc.22297
更新日期:2014-09-01 00:00:00
abstract::Specific properties of the vessel wall of arteries employed as coronary bypass grafts are thought to play an important role in the short- and long-term performance of these conduits. Heterogeneity in the endothelial and smooth muscle cell function between different arteries may provide particular vessels with properti...
journal_title:Clinical cardiology
pub_type: 杂志文章,评审
doi:10.1002/clc.4960190307
更新日期:1996-03-01 00:00:00
abstract::We report a patient with controlled atrial fibrillation-flutter (AFF) and mitral stenosis who developed a marked increase in atrioventricular conduction during an infusion of low dose dopamine with development of hemodynamic compromise. This side effect has not been previously described in humans. Dopamine infusion sh...
journal_title:Clinical cardiology
pub_type: 杂志文章
doi:10.1002/clc.4960101114
更新日期:1987-11-01 00:00:00
abstract::Atrial natriuretic peptide (ANP) levels were measured prior to and at 1 and 5 minutes postcontrast left ventriculography with an ionic contrast agent (diatrizoate), and a nonionic agent (iopamidol) and the results were compared. Since ionic contrast agents have been found to cause an increase in left ventricular end-d...
journal_title:Clinical cardiology
pub_type: 杂志文章
doi:10.1002/clc.4960130911
更新日期:1990-09-01 00:00:00
abstract::A total of 140 consecutive patients with acute Q-wave myocardial infarction was evaluated to assess the relationship between different electrocardiographic patterns of evolution and the incidence of recurrent ischemia within 10 days of infarction. Patients were allocated to three groups according to the electrocardiog...
journal_title:Clinical cardiology
pub_type: 杂志文章
doi:10.1002/clc.4960181205
更新日期:1995-12-01 00:00:00
abstract:BACKGROUND:The role of electrocardiogram (ECG) is unclear for the longitudinal follow-up of patients who undergo corrective surgery for isolated severe tricuspid regurgitation (TR). HYPOTHESIS:This study sought to investigate the usefulness of changes in QRS duration of ECG after TR surgery in predicting right ventric...
journal_title:Clinical cardiology
pub_type: 杂志文章
doi:10.1002/clc.22030
更新日期:2012-11-01 00:00:00
abstract::Coronary artery disease (CAD) is still the number-one killer in the world, and clinical trials indicate that it is preventable. Mortality and morbidity can be reduced by at least 30% to 40% by treating known risk factors. Genetic susceptibility is claimed to account for 50% of predisposition. The challenge of preventi...
journal_title:Clinical cardiology
pub_type: 杂志文章,评审
doi:10.1002/clc.22002
更新日期:2012-09-01 00:00:00
abstract::Hospitals typically use Center for Medicare and Medicaid Services' (CMS) Hospital Readmission Reduction Program (HRRP) administrative reports as the standard of heart failure (HF) admission quantification. We aimed to evaluate the HF admission population identified by CMS HRRP definition of HF hospital admissions comp...
journal_title:Clinical cardiology
pub_type: 杂志文章
doi:10.1002/clc.22711
更新日期:2017-09-01 00:00:00
abstract::Primary amyloidosis, systemic senile amyloidosis, isolated atrial amyloidosis, and transthyretin isoleucine 122 amyloidosis frequently involve the heart. Amyloid fibrils infiltrate the myocardium, impairing ventricular contraction and relaxation. The clinical manifestations of cardiac infiltration in these disorders a...
journal_title:Clinical cardiology
pub_type: 杂志文章,评审
doi:10.1002/clc.4960210804
更新日期:1998-08-01 00:00:00
abstract::Diffuse pulmonary hemorrhage has rarely been reported as a complication of thrombolytic therapy. Recently, two patients who developed this complication were observed at our institution. This diagnosis should be considered in any post-thrombolytic patient with respiratory distress, diffuse pulmonary infiltrates, and an...
journal_title:Clinical cardiology
pub_type: 杂志文章
doi:10.1002/clc.4960200321
更新日期:1997-03-01 00:00:00
abstract:BACKGROUND:Variations in the apolipoprotein E (apo E) gene may predict the incidence of coronary artery disease (CAD). However, the correlation between apo E polymorphism and the severity of CAD is still unclear. HYPOTHESIS:Apolipoprotein E polymorphism can predict CAD. METHODS:Used a case-case study of 213 Chinese a...
journal_title:Clinical cardiology
pub_type: 杂志文章
doi:10.1002/clc.20703
更新日期:2010-06-01 00:00:00
abstract:BACKGROUND:Primary percutaneous coronary intervention (PCI) is the most common method of reperfusion in patients with ST-segment elevation myocardial infarction (STEMI) in the United States. The intersection between processes of care and performance measures such as door-to-balloon (D2B) times and clinical trials evalu...
journal_title:Clinical cardiology
pub_type: 杂志文章,随机对照试验
doi:10.1002/clc.22349
更新日期:2015-01-01 00:00:00
abstract:BACKGROUND:Inflammation is a key factor in the development of atherosclerotic disease and acute coronary syndromes (ACS). The P2Y(12) receptor antagonists ticagrelor (AZD6140) and clopidogrel may have anti-inflammatory effects. The objective of this analysis from the Dose Confirmation Study Assessing Anti-Platelet Effe...
journal_title:Clinical cardiology
pub_type: 杂志文章,多中心研究,随机对照试验
doi:10.1002/clc.20732
更新日期:2010-04-01 00:00:00
abstract::Homozygous familial hypercholesterolemia (HFH) is a very rare autosomal dominant disease characterized by accelerated severe atherosclerosis. We examined 18 patients from 9 families with HFH. The age range was 6-30 years (mean = 16 years). Male to female ratio was equal. All patients had huge, multiple tuberous xantho...
journal_title:Clinical cardiology
pub_type: 杂志文章
doi:10.1002/clc.4960120608
更新日期:1989-06-01 00:00:00
abstract:BACKGROUND:Intravenous inotropic intervention in congestive heart failure is generally associated with a poor prognosis and is largely used as a "bridge" to mechanical support or heart transplantation. HYPOTHESIS:We hypothesized that the inotropic support afforded by dobutamine may serve as a bridge to the introductio...
journal_title:Clinical cardiology
pub_type: 杂志文章
doi:10.1002/clc.4960240311
更新日期:2001-03-01 00:00:00
abstract::Constrictive pericarditis is a fibrotic process involving both layers of the pericardium and is known to give rise to obstruction to blood flow in the right heart. We report a patient with constrictive pericarditis who had echocardiographic features of mitral stenosis caused by a fibrocalcific mass lesion involving th...
journal_title:Clinical cardiology
pub_type: 杂志文章
doi:10.1002/clc.4960190615
更新日期:1996-06-01 00:00:00
abstract::Experimental and clinical studies with angiotensin-converting enzyme (ACE) inhibitors have suggested that these agents may reduce the risk of atherothrombotic events. Recent studies have identified the role of angiotensin II and ACE in the regulation of fibrinolysis. There is now substantial evidence that the renin-an...
journal_title:Clinical cardiology
pub_type: 杂志文章,评审
doi:
更新日期:1997-11-01 00:00:00
abstract::Cardiovascular risk factors are known to be associated with the presence of erectile dysfunction (ED), and ED is more common in men with cardiovascular disease (CVD). The Princeton Guidelines provide a strategy for assessing cardiac risk and planning a safe return to sexual activity. Men at low risk, who have fewer th...
journal_title:Clinical cardiology
pub_type: 杂志文章,评审
doi:10.1002/clc.4960271304
更新日期:2004-04-01 00:00:00
abstract::In two patient series including 809 and 327 patients, respectively, with acute myocardial infarction we have compared those who died in myocardial rupture (verified at autopsy, Group A) with those who died without rupture (autopsied, Group B), and those who survived hospitalization (Group C) with regard to previous hi...
journal_title:Clinical cardiology
pub_type: 临床试验,杂志文章
doi:10.1002/clc.4960110203
更新日期:1988-02-01 00:00:00
abstract:BACKGROUND:It is known that exercise-induced ST-segment elevation in lead V1 (V1-E) detects left anterior descending (LAD) stenosis. It was also postulated that ST elevation in aVR and simultaneous ST depression in V5 (aVR-E + V5-D) is a marker of ischemia due to significant stenosis of the LAD in patients with single-...
journal_title:Clinical cardiology
pub_type: 杂志文章
doi:10.1002/clc.4960260506
更新日期:2003-05-01 00:00:00
abstract::Flecainide is reported to be effective in patients with paroxysmal tachycardias, but its effect on rapid ventricular response over accessory atrioventricular pathway during atrial fibrillation is not known. The influence of flecainide on various electrophysiological properties of the accessory pathway with special emp...
journal_title:Clinical cardiology
pub_type: 杂志文章
doi:10.1002/clc.4960080603
更新日期:1985-06-01 00:00:00
abstract::Isolated tricuspid insufficiency (TI) is relatively uncommon and mostly of traumatic origin. We report clinical noninvasive and invasive findings and surgical results in 5 cases. All patients had complete clinical, noninvasive and invasive studies including right and left catheterization, and coronary angiographies in...
journal_title:Clinical cardiology
pub_type: 杂志文章
doi:10.1002/clc.4960070509
更新日期:1984-05-01 00:00:00
abstract:BACKGROUND:Although sudden death (SD) is a rare complication after atrioventricular junction (AVJ) ablation and permanent pacemaker implantation, the risk factors leading to this SD remain unknown. The purpose of this study was to investigate SD and its risk factors after ablate-and-pace strategy for rate control in at...
journal_title:Clinical cardiology
pub_type: 杂志文章
doi:10.1002/clc.22600
更新日期:2017-01-01 00:00:00
abstract::Thrombotic obstruction of aortic bioprostheses is rare. Few cases have been reported involving the use of the Carpentier-Edwards (CE) prosthesis, the Hancock bioprosthesis, or the Medtronic Intact porcine valve. Thrombolytic therapy for mechanical valve thrombosis has been used frequently even though it is known to ca...
journal_title:Clinical cardiology
pub_type: 杂志文章
doi:10.1002/clc.4960160215
更新日期:1993-02-01 00:00:00
abstract::Sixteen patients with metastatic carcinoid tumors of ileal or cecal origin were studied in order to evaluate the frequency and degree of cardiac involvement in a nonselected patient group. We have also studied the correlation between plasma hormone levels (e.g., 5-hydroxytryptamine (5-HT) and substance P) and the degr...
journal_title:Clinical cardiology
pub_type: 杂志文章
doi:10.1002/clc.4960090104
更新日期:1986-01-01 00:00:00
abstract:BACKGROUND:Acute coronary syndromes (ACS) are characterized by activation of systemic and local inflammatory mediators. The interrelation between these soluble inflammatory markers and their association with markers of myocardial necrosis have not been extensively studied. HYPOTHESIS:The study was undertaken to evalua...
journal_title:Clinical cardiology
pub_type: 杂志文章
doi:10.1002/clc.4960280405
更新日期:2005-04-01 00:00:00
abstract::A case of systemic hypotension with volume depletion not responding to intravenous fluids was found to have features of cardiac tamponade on two-dimensional (2-D) echocardiography. Intracardiac pressures were normal on cardiac catheterization. An interesting observation was the presence of left ventricular (LV) collap...
journal_title:Clinical cardiology
pub_type: 杂志文章
doi:10.1002/clc.4960210318
更新日期:1998-03-01 00:00:00
abstract::Although physical fitness is a powerful prognostic marker in clinical medicine, most cardiovascular population-based studies do not have a direct measurement of cardiorespiratory fitness. In line with the call from the National Heart Lung and Blood Institute for innovative, low-cost, epidemiologic studies leveraging e...
journal_title:Clinical cardiology
pub_type: 杂志文章
doi:10.1002/clc.22302
更新日期:2014-08-01 00:00:00
abstract:BACKGROUND:Limited information is available regarding outcome of very elderly patients referred for percutaneous coronary intervention (PCI). PURPOSE:This study aimed to assess acute and intermediate term clinical outcomes among nonagenarians. METHODS:The study included 32 consecutive nonagenarian patients undergoing...
journal_title:Clinical cardiology
pub_type: 杂志文章
doi:10.1002/clc.20596
更新日期:2009-12-01 00:00:00