Clinical, angiographic and procedural characteristics of longitudinal stent deformation.

Recently, longitudinal stent deformation (LSD) has been reported increasingly. Even though the reported cases included almost all stent designs, most cases were seen in the Element™ stent design (Boston Scientific, Natick, MA, USA). It is considered that stent design, lesion and procedural characteristics play a role in the etiology of LSD. Yet, the effect of LSD on long-term clinical outcomes has not been studied well. Element stents implanted between January 2013 and April 2015 in our hospital were examined retrospectively. Patients were grouped into two according to the presence of LSD, and their clinical, lesion and procedural characteristics were studied. Twenty-four LSD's were detected in 1812 Element stents deployed in 1314 patients (1.83 % of PCI cases and 1.32 % of all Element stents). LMCA lesions (16.7 % vs 1.6 %, p < 0.001), complex lesions (75 % vs 35.1 %, p < 0.001), bifurcation lesions (37.5 % vs 18.3 %, p = 0.017), ostial lesions (33.3 % vs 12.8 %, p = 0.003), using of extra-support guiding catheter (54.2 % vs 22.3 %, p < 0.001) and extra-support guidewire (37.5 % vs 16.2 %, p = 0.005) were found to be more frequent in cases with LSD than in cases without it. In addition, the number of stents, stent inflation pressure and the use of post-dilatation were significantly different between the two groups. Two patients had an adverse event during the follow-up period. LSD is a rarely encountered complication, and is more common in complex lesions such as ostial, bifurcation and LMCA lesions. The use of extra-support guiding catheter, extra-support guidewires and low stent inflation pressure increases the occurrence of LSD. Nevertheless, with increased awareness of LSD and proper treatment, unwanted long-term outcomes can be successfully prevented.

Evaluation of adiponectin and lipoprotein(a) levels in cardiac syndrome X.

AIMS: Low adiponectin and high lipoprotein(a) [Lp(a)] levels are associated with endothelial dysfunction, atherosclerosis, and coronary artery disease. Cardiac syndrome X (CSX) is characterized by anginal symptoms, positive stress test, and documentation of normal epicardial coronary arteries with angiography. In this study we aimed to investigate the relationship between CSX and circulating levels of adiponectin and Lp(a). PATIENTS AND METHODS: We enrolled 53 female patients with CSX and 33 patients as the control group. The diagnosis of CSX was made according to presence of angina, findings suggestive of ischemia during stress electrocardiography or myocardial perfusion scintigraphy, and documentation of normal coronary arteries in coronary angiography. The control group consisted of patients with atypical angina and normal stress electrocardiography test results. Both groups were matched in terms of hypertension, diabetes mellitus, and metabolic syndrome. RESULTS: Adiponectin levels were significantly decreased in patients with CSX (4.57 µg/ml vs. 13.18 µg/ml; p=0.001); however, Lp(a) levels were significantly increased (36.30 mg/dl vs. 7.24 mg/dl; p < 0.001). Low-density lipoprotein cholesterol (LDL-C), high-density lipoprotein cholesterol (HDL-C), and triglycerides (TG) concentrations did not differ between the case group and the control group (p=0.14, p=0.62, p=0.64, respectively). There was no significant difference between groups in terms of age, body mass index, waist circumference hypertension, hyperlipidemia, diabetes mellitus, or metabolic syndrome. In multivariate analysis, Lp(a) and adiponectin were found to be independent predictors of CSX. An Lp(a) level of > 21 mg/dl had 84 % sensitivity and 96 % specificity {area under the curve (AUC)= 0.922, p < 0.0001, 95 % CI [0.842-0.970]} and an adiponectin level of ≤ 5.18 µg/ml also had 58.7 % sensitivity and 82.1 % specificity (AUC=0.726, p=0.0003, 95 % CI [0.609-0.823]) for detecting CSX. CONCLUSION: We detected low adiponectin and high Lp(a) levels in patients with CSX and these findings may be related to the microvascular injury in CSX.

Impact of valve surgery on serum osteopontin levels in patients with mitral regurgitation.

OBJECTIVE: Osteopontin (OPN), a sialoprotein present within atherosclerotic lesions, especially in calcified plaques, is linked to the progression of coronary artery disease and heart failure. We assessed the impact of valve surgery on serum OPN and left ventricular (LV) function in patients with mitral regurgitation (MR). METHODS: Thirty-two patients with severe MR scheduled for surgery were included in the study. Echocardiography markers were assessed preoperatively and at 3 months following the surgery and matched with the serum OPN levels. RESULTS: Valve surgery was associated with a reduction of the ejection fraction (EF) from 55.2 ± 6.3 to 48.8 ± 7.1% after surgery, p < 0.001. Following surgery, the OPN level was significantly higher than preoperatively (mean 245, range 36-2,284 ng/ml vs. 76, 6-486 ng/ml, p = 0.007). Preoperative OPN exhibited a slight negative correlation with the EF (r = -0.35, p = 0.04), and a moderate correlation with vena contracta (r = -0.38, p = 0.02). There were no other meaningful correlations between conventional echocardiographic parameters and OPN. CONCLUSION: Following valve surgery due to severe MR, patients exhibited a decrease in EF and an increase in OPN levels. The assessment of preoperative OPN failed to strongly predict probable LV dysfunction.

Complete A-V block: incidental or a part of cor triatriatum dexter.

Cor triatriatum dexter (CTD) is an extremely rare cardiac anomaly in which the right atrium is divided into two distinct chambers by a membrane. The persistence of the right valve of sinus venosus results in a complete septation of the right atrium. This anomaly is frequently associated with other right-sided cardiac abnormalities. Its clinical manifestation and the need for intervention are determined by the number and the size of the fenestrations on the membrane, associated cardiac anomalies and arrhythmias. We describe a case of CTD in a patient with complete atrioventricular (A-V) block.

Cilostazol decreases total atrial conduction time in patients with peripheral artery disease.

OBJECTIVE: Total atrial conduction time (TACT) is the most important parameter in predicting the development of new-onset atrial fibrillation. We investigated the effect of cilostazol therapy on TACT in patients with peripheral artery disease. METHODS: Thirty patients with peripheral artery disease were treated with cilostazol (200 mg/day) for 6 months. The baseline echocardiographic total atrial conduction time parameter was compared with the 6-month follow-up. RESULTS: The TACT duration was decreased in all patients compared with the baseline after therapy (121.8 ± 19.3 vs. 109.1 ± 15.9 milliseconds, p<0.001). However, left atrial (LA) diameter was not changed with the therapy. The reduction of TACT duration was correlated with the increase in mitral E wave velocity/mitral A wave velocity ratio (r=-0.48, p<0.003). CONCLUSION: Our results showed that 200 mg cilostazol treatment decreased TACT duration in patients with peripheral artery disease, which may also prevent the development and/or recurrence of atrial fibrillation (AF).

Pregnancy-associated myocardial infarction : case report and review of the literature.

Acute myocardial infarction (AMI) is a rare, but possibly catastrophic event during pregnancy, delivery, or puerperium, leading to a high mortality rate. It has different pathogenic mechanisms, such as atherosclerosis, vasospasm, thrombosis, and coronary dissection. Although MI has been reported in pregnant women at all stages of pregnancy and postpartum, it occurs more commonly in the third trimester. Pregnancy-associated MI most commonly involves the anterior wall. Pregnancy itself is an independent risk factor for MI, conferring a fourfold higher risk than that of nonpregnant women matched for age. We report the case of a 27-year-old primigravida at 30 weeks' gestation presenting with anterior MI, secondary to severe stenosis of the left anterior descending coronary artery, treated with emergency percutaneous coronary intervention.

Case series of a rare complication of CABG. Fistula between the internal mammary artery and pulmonary vasculature.

BACKGROUND: There are few reports in the literature on the development of a fistulous connection between the left internal mammary artery (LIMA) and the pulmonary vasculature (PV) after coronary artery bypass grafting (CABG). This type of fistula may cause angina after CABG. Various mechanisms in the pathophysiology of this rare condition have been proposed. METHODS: We evaluated 537 consecutive patients with CABG surgery who underwent coronary angiography at our institution between January 2011 and March 2012. The post-CABG angiograms were evaluated for LIMA-PV fistula formation. Presence of a LIMA-PV fistula was defined as opacification of the PV or parenchyma after injection of radiopaque contrast medium into the LIMA. RESULTS: We found that 5 of 537 patients (0.93 %) had a LIMA-PV fistula on post-CABG coronary angiograms. The mean age of patients with a LIMA-PV fistula was 61.4 years (range, 51-72 years) and all patients were male. Coronary angiography was performed in the setting of myocardial infarction for 2 patients with a LIMA-PV fistula, and stable angina pectoris was the indication for coronary angiography in the remaining 3 patients. The mean diagnosis time of LIMA-PV fistula after CABG was 3.4 years (range, 1-9 years). None of the patients had a history of redo-CABG, perioperative mediastinitis, or pneumonia. CONCLUSION: LIMA-PV fistulas may occur more frequently than reported on post-CABG angiogram findings. Angina in post-CABG patients may be associated with a LIMA-PV fistula, and selective cannulation of the LIMA with careful evaluation of the angiographic images may provide proper diagnosis and treatment of this entity.

Takotsubo cardiomyopathy after bisoprolol withdrawal and open appendectomy.

Takotsubo cardiomyopathy (TTC) is an acute cardiac syndrome characterized by transient regional wall motion abnormalities of the left ventricular apex or midventricle. Patients often present with chest pain or dyspnea, ST-segment elevation, and minor elevation of cardiac enzyme levels. TTC has been associated with severe emotional or physical stress such as severe burns, spinal cord injury, subarachnoid hemorrhage, multiple traumas, and surgery. We report a case of TTC in a 45-year-old woman who had undergone appendectomy 2 days before presenting to our institution.

Delayed right atrial lateral electromechanical coupling relative to the septal one can be associated with paroxysmal atrial fibrillation.

BACKGROUND: Non-invasive prediction of paroxysmal atrial fibrillation (PAF) is one of the most recent interests of cardiology. AIM: The current study investigates the relationship between the atrial electromechanical coupling time (EMCT) and PAF. PATIENTS AND METHODS: A group of 35 patients with PAF was compared with a group of 37 subjects without PAF. Pulsed wave tissue Doppler evaluations of atrial walls were performed from apical four chambers view under ECG monitoring. The time intervals from the onset of P wave to the onset of late diastolic wave (A') at right atrial wall (P-RA), interatrial septum (P-IAS), and left atrial wall (P-LA, maximum EMCT) were measured. The right atrial EMCT (P-RA minus P-IAS), left atrial EMCT (P-LA minus P-IAS) and interatrial EMCT (P-LA minus P-RA) were computed. A' wave velocities were measured from each atrial wall. RESULTS: RA (16.0±13.1 vs. -8.7±18.6 ms, p < 0.001) and maximum (91.5±32.6 vs. 72.0±23.1 ms, p = 0.001) EMCT were longer, RA A' velocity was higher in the patient group. There were no differences between the groups in LA and interatrial EMCT, and septal and LA A' velocities. Regression analysis revealed that only RA [OR: 1.148 (1.041-1.267), p = 0.006] and maximum [OR: 1.099 (1.009-1.197), p = 0.031] EMCT were independent variables for PAF. In order to predict patients with PAF, we have chosen +7.5 msn for the RA EMCT which yielded 69% sensitivity and 71.4% specificity to predict patients. CONCLUSIONS: Delayed RA lateral EMCT relative to septal one and delayed maximum EMCT detected by tissue Doppler could be a valuable method for identifying patients with PAF.

Echocardiographic evaluation of right ventricular functions after successful percutaneous recanalization of right coronary artery chronic total occlusions.

BACKGROUND: No data exist on regarding possible improvement will occur in right ventricular (RV) functions after successful recanalization of right coronary artery chronic total occlusions (RCA CTOs). AIM: Our aim was to evaluate the revascularization induced changes in RV functions by novel echocardiographic techniques like tissue Doppler imaging (TDI) and two dimensional speckle tracking echocardiography (2DSTE). PATIENTS AND METHODS: Forty-one consecutive successfully recanalized patients with RCA CTOs were included in our study. All included patients underwent standard echocardiography with TDI and 2DSTE to assess RV function before procedure and repeated after 24 hours and 1 month. RESULTS: There were no significant changes in tricuspid annular plane systolic excursion, systolic myocardial velocities, and fractional area change values. However, RV global longitudinal strain and systolic strain rate values showed a significant increase at 24 hours after percutaneous coronary intervention compared to baseline (-23.6±4.1% vs. -19.7±3.9%, p < 0.001 and -1.55±0.18s-1 vs. -1.18±0.17s-1, p < 0.001, respectively). Moreover, improvement of the RV functions in patients with RCA CTOs was further suggested by the higher RV isovolumic acceleration values at 1-month compared with baseline (2.29±0.62 vs. 2.05±0.5 m/s2, p = 0.014). CONCLUSIONS: TDI derived isovolumic acceleration and 2DSTE derived global longitudinal strain and systolic strain rate values showed improvement in RV functions after successful percutaneous recanalization of RCACTOs suggesting viability of RV in chronic ischemia.