Assessment of Aspirin and Clopidogrel Resistance in Patients Undergoing Cardiovascular Surgery: A Single-Center Cross-Sectional Study

Objective: We aimed to investigate antiplatelet drug resistance utilizing light transmission-lumiaggregometry (LT-LA) and the Platelet Function Analyzer-100 (PFA-100) in patients undergoing cardiovascular surgery. Materials and Methods: The study included 60 patients diagnosed with stable coronary artery disease and peripheral vascular diseases that required surgery. Participants were divided into three groups: patients receiving aspirin (ASA) (n=21), patients receiving clopidogrel (CLO) (n=19), and patients receiving dual therapy (ASA+CLO) (n=20). Aggregation and secretion tests by LT-LA and closure time by the PFA-100 were used to measure antiplatelet drug resistance. Results: Based on the adenosine diphosphate (ADP)-induced aggregation test, 43% of patients were resistant to ASA, 22% to CLO, and 15% to dual therapy. Diabetes, hypertension, and hyperlipidemia were the most commonly identified comorbid disorders. In patients with comorbid risk factors, the median value of platelet aggregation response to ADP was significantly higher in the ASA group than in the CLO and dual therapy groups (p=0.0001). In patients receiving ASA monotherapy, the maximum amplitude of aggregation response to platelet agonists was ≥70% in 43% of patients for ADP and 28% for collagen by LT-LA. Elevated ADP (≥0.29 nmol) and collagen (≥0.41 nmol)-induced adenosine triphosphate release were found by LT-LA in 66% of patients utilizing an ADP agonist and 80% of patients using a collagen agonist undergoing ASA therapy. Closure times obtained with the PFA-100 were normal in 28% of patients using collagen-ADP cartridges and 62% of patients using collagen-epinephrine (CEPI) cartridges who received ASA. Recurrent thrombosis and bleeding were observed in 12 (20%) patients with cardiovascular disease. Three of these individuals (25%) showed ASA resistance with normal responses to ADP-induced aggregation (≥70%) and secretion (≥0.29 nmol), as well as normal CEPI closure times. Conclusion: Our findings suggest that antiplatelet drug monitoring by LT-LA and PFA-100 may be useful for high-risk and complicated cardiovascular patients.

A rare cause and an even rarer treatment of hypertension in a 5-year-old boy: Mid-aortic syndrome.

Renal artery stenosis is one of the common vascular diseases that cause hypertension in children. However, renal artery aneurysms and abdominal aortic aneurysms, which may be components of mid-aortic syndrome, are rarely associated with renal artery stenosis. Despite its rarity, early diagnosis and treatment are critical to prevent fatal complications. Currently, non-surgical invasive techniques are considered the first choice for treatment, but in some cases, surgery is inevitable. Here, we present a 5-year-old boy with a mid-aortic syndrome. The patient presented with a history of severe headache and epistaxis 5-6 times a day and was diagnosed with hypertension. A 9 × 9 mm saccular aneurysm on the anterior surface of the abdominal aorta at the level of the left renal artery ostium, and a 12 mm aneurysm in the left renal artery after a stenotic segment at the hilum level was detected in the doppler USG and contrast-enhanced imaging techniques. The patient was operated on electively. We used a PTFE patch to repair the abdominal aorta and, saphenous vein which was taken from his father to repair the renal artery. The patient recovered well and was discharged on the 18th day.

Transcatheter radiofrequency pulmonary valve perforation in newborns with pulmonary atresia/intact ventricular septum: Echocardiographic predictors of biventricular circulation.

OBJECTIVE: We report a single-institute experience of neonatal transvenous radiofrequency pulmonary valve perforation for pulmonary atresia/intact ventricular septum, with echocardiographic predictors of biventricular circulation. METHODS: Data were reviewed retrospectively for all neonates who underwent primary transvenous pulmonary valve perforation for pulmonary atresia/intact ventricular septum between January 2008 and November 2018 at our institution. We compared patients who need systemic-to-pulmonary shunt or ductal stenting with patients who did not need. RESULTS: During the study period, 31 patients with pulmonary atresia/intact ventricular septum underwent successful radiofrequency pulmonary valve perforation and balloon dilation of the pulmonary valve. There was no procedure-related mortality. Sixteen patients (52%) needed systemic-to-pulmonary shunt or ductal stenting after initial procedure. Among the survivors (follow-up time of 1 to 11.5 years), 15 patients had a biventricular circulation and 6 patients had 1 and 1/2 ventricular circulation. Two patients are awaiting for Fontan operation. Both the TV/MV annulus ratio (>0.85) and tricuspid valve z-score (>-1) were found to be a good predictor of a biventricular outcome in our cohort. CONCLUSIONS: Percutaneous radiofrequency pulmonary valve perforation and balloon valvotomy is an effective and safe primary treatment strategy for neonates with pulmonary atresia/intact ventricular septum. Ductal stenting or systemic-to-pulmonary shunt may be required in the majority of patients who had smaller right heart components. Preselection of patients according to tricuspid valve z-score and TV/MV annulus ratio allows predicting biventricular circulation.

Predictive Value of Vasoactive-inotropic Score for Mortality in Newborns Undergoing Cardiac Surgery.

OBJECTIVE: Vasoactive-inotropic Score (VIS) was developed to quantify the amount of inotropic support provided in the postoperative period. We investigated the predictive value of (VIS) for mortality in neonates with congenital heart disease (CHD). STUDY DESIGN: Prospective cohort. PATIENTS: 119 newborns who underwent cardiac surgery. SETTING: Tertiary NICU-CHD center of Ankara from November 2016 to January 2019. INTERVENTION/MEASUREMENT: VIS values were calculated by a standard formula for the first 72 postoperative hours, and the maximum score was recorded. PRIMARY OUTCOMES: Duration of mechanical ventilation, NICU length of stay, and mortality. RESULTS: At surgery, the median (IQR) age was 15 d (9-31). The patients were divided into two groups according to mortality; Group 1 (Non-survivors) (n=36) and Group 2 (Survivors) (n=83). Higher VIS score was correlated to longer duration of mechanical ventilation (P=0.009, r=0.33), and was higher among patients who died (P=0.003). Area under the curve (AUC) was 0,83 (P<0.001, CI: 95% 0.7-0.9) for VIS to identify mortality. At a cut-off value of 15.5, sensitivity and negative predictive values of VIS for mortality were 73.6% and 85.3%, respectively. The higher VIS (>15.5) was independently associated with increased odds for mortality (OR: 8.1, 95% CI: 1.8-35.7, P=0.005). CONCLUSIONS: In newborns with CHD, a higher VIS within 72 hours after cardiac surgery is associated with increased duration of mechanical ventilation, and mortality. VIS may be useful for prediction of mortality at early postoperative period.

True aneurysmal dilatation of a valved bovine jugular vein conduit after right ventricular outflow tract reconstruction: a rare complication.

Valved bovine jugular vein conduit is considered a suitable choice for paediatric population with congenital heart defect requiring right ventricle to main pulmonary artery connection. However, complications related to the use of this device have been reported, with conduit failure occurring mainly as a consequence of stenosis, conduit thrombosis, and valve regurgitation. We present a case of aneurysmal conduit failure of a valved bovine jugular vein conduit used to reconstruct the right ventricular outflow tract.

A Rare Cause of Multiple Pseudoaneurysms of Radial Artery After Coronary Angiography: Behcet's Disease.

Patients with Behçet's disease are at risk for iatrogenic aneurysms after interventions. Presently described is the case of a 55-year-old male with multiple pseudoaneurysms occurring in the late period after a coronary angiography procedure performed via the radial artery. There was no previous diagnosis of vasculitis. Behçet's disease was revealed to be the underlying pathology.

Evaluation of endothelial dysfunction with flow-mediated dilatation after transradial coronary angiography.

Objective Transradial coronary angiography (TRCA) may lead to endothelial dysfunction. Therefore, this study investigated the TRCA-related endothelial dysfunction and its relation to operator experience, the number of punctures and procedure duration. Methods and results A total of 57 patients (42 males and 17 females) who underwent TRCA were included in this single-centre study. Nine months after the procedure, all patients underwent radial artery B-mode ultrasound imaging, and flow-mediated dilatation (FMD) and nitroglycerin-mediated dilatation (NMD) techniques were employed. The non-intervened right radial artery was accepted as control. The percentage change in diameter after FMD was significantly greater in the right radial artery compared to the left radial artery (right 13.6% vs left 10.1%, P = 0.041). The percentage change in diameter after NMD was similar in both right and left radial arteries (right 23.8% vs left 23.4%, P = 0.932). According to the puncture numbers, the percentage change was significantly lower in the intervened artery among patients with more than one puncture (13.3% vs 7.8%, P = 0.005). According to the operator experience, the percentage change in the intervened artery was significantly higher in patients in whom the procedure was performed by experienced operators (13.7% vs 7.6%, P = 0.002). The procedure duration also showed a negative correlation with the percentage change in the intervened artery (r = -0.349, P = 0.008). Conclusions TRCA may lead to endothelial dysfunction represented by FMD. Moreover, higher puncture numbers for sheath insertion, longer procedure durations and less experience in radial interventions may have adverse effects on the endothelial function.

Comparison of two different skin preparation strategies for open cardiac surgery.

INTRODUCTION: Surgical site infection (SSI) is a serious complication after cardiac surgery; skin preparation is an important step in the prevention of wound contamination with skin flora. In this study, two different skin preparation strategies (standard povidine iodine cleaning plus plain adhesive drape and microbial sealant (InteguSeal, Kimberly-Clark Health Care, Roswell, GA, USA) were compared in cardiac surgery patients. METHODOLOGY: This prospective study included 96 cardiac surgery patients randomized to either a standard plain adhesive drape (28 patients, control group) or a microbial sealant (68 patients, study group). Bacterial isolates were obtained from the wounds in the operating room before the skin incision and after the surgical procedure had ended. RESULTS: Microorganisms were isolated from 38 patients (39.6%) in the study population. Twenty-seven of these patients were from the microbial sealant group and 11 were from the plain adhesive drape group. No postoperative wound infection was encountered in either group. No statistically significant differences between the two groups regarding the number of patients with microorganism isolation (p = 0.974) or postoperative leukocyte counts and neutrophil granulocyte percentages were observed. CONCLUSIONS: Regarding SSI after cardiac surgery, microbial sealant is equivalent to the standard skin preparation strategy applied with povidine iodine cleaning and a plain adhesive drape.

Surgery for rheumatic valve disease in pregnancy: what about the newborn?

BACKGROUND: Valvular heart disease constitutes the majority of all causes of cardiac disease in pregnancy. The significant physiological haemodynamic changes of pregnancy may cause serious cardiac problems leading to severe maternal and foetal morbidity and mortality. In this study, we evaluate the effect of maternal rheumatic valvular disease requiring definitive operation concurrent with caesarian delivery on maternal and foetal outcome. METHODS: Between 2003 and 2010, a total of nine pregnant women and nine live births were examined. Immediately after caesarean section, the newborns were examined by the neonatologist and transferred to the neonatal intensive care unit. All the mothers were followed routinely with clinical and echocardiographic examinations. RESULTS: The age at the time of delivery ranged between 21 and 36 years (median 31 years). Postoperative period of mothers was uneventful and mean hospital stay was 7.56±3.97 days. Birth weight for the newborns was ranged between 1370 and 2900g. Six of the newborns were premature (≤37 weeks). Four newborns were small for gestational age (SGA). There was no mortality in newborns. Hospital stay for the newborns ranged between four and 54 days. CONCLUSIONS: Careful follow-up of pregnancies with valvular heart diseases and determining the optimal time of cardiac intervention are the essential issues. We suggest that careful follow-up of both mother and foetus until at least the 28th gestational week, following which combined caesarian section and cardiac surgery can be performed.

Mean platelet volume may predict early clinical outcome after coronary artery bypass grafting.

BACKGROUND: An elevated mean platelet volume is associated with increased platelet activation and thus may predict thrombotic events. The goal of this study was to investigate the association of the mean platelet volume and the major adverse events after coronary artery bypass surgery. METHODS: Baseline clinical details and preoperative hematologic parameters were obtained prospectively in 205 consecutive patients undergoing coronary artery bypass surgery. Postoperative mortality and major adverse events were recorded in the early postoperative period (median of 72 days, interquartile range 58.5-109 days). RESULTS: Combined adverse events occurred in 37 patients (18.0%) during the early follow-up. The preoperative mean platelet volume and hematocrit levels were found to be associated with postoperative adverse events (p<0.001 for both variables). In multivariate logistic regression models, the preoperative mean platelet volume and hematocrit levels were strong independent predictors of combined adverse events after surgery (respectively OR 1.89, p=0.037; OR 0.87, p=0.011). After receiver-operating-characteristics curve analysis, using a cut-point of 8.75 fL, the preoperative mean platelet volume level predicted adverse events with a sensitivity of 54% and specificity of 70%. In a further model with cut-off points, higher preoperative mean platelet volume levels remained a powerful independent predictor of postoperative myocardial infarction (OR 3.60, p=0.013) and major adverse cardiac events (OR 2.53, p=0.045). CONCLUSIONS: An elevated preoperative mean platelet volume is associated with an adverse outcome after coronary artery bypass grafting. In conclusion, we can say that mean platelet volume is an important, simple, readily available, and cost effective tool and can be useful in predicting the postoperative adverse events in patients undergoing coronary artery bypass grafting.