- Pediatric Cardiology
Clinical Assistant Professor, Pediatrics - Cardiology
Fellowship:LPCH/Stanford (2015) CA
Board Certification: Pediatric Cardiology, American Board of Pediatrics (2014)
Fellowship:Cincinnati Children's Hospital Medical Center (2014) OH
Board Certification: Pediatrics, American Board of Pediatrics (2011)
Residency:Cincinnati Children's Hospital Medical Center (2011) OH
Medical Education:Georgetown University (2008) DC
Right Ventricular Outflow Tract Obstruction: Pulmonary Atresia With Intact Ventricular Septum, Pulmonary Stenosis, and Ebstein's Malformation.
Pediatric critical care medicine
2016; 17 (8): S323-9
The objectives of this review are to discuss the anatomy, pathophysiology, clinical course, and current treatment strategies for pulmonary atresia with intact ventricular septum, pulmonary stenosis, and Ebstein's anomaly.MEDLINE and PubMed.Considerable advances have been made in management strategies for these complex congenital heart lesions, which have led to improved outcomes.
View details for DOI 10.1097/PCC.0000000000000818
View details for PubMedID 27490618
Acute Kidney Injury and Cardiorenal Syndromes in Pediatric Cardiac Intensive Care.
Pediatric critical care medicine
2016; 17 (8): S250-6
The objectives of this review are to discuss the definition, diagnosis, and pathophysiology of acute kidney injury and its impact on immediate, short-, and long-term outcomes. In addition, the spectrum of cardiorenal syndromes will be reviewed including the pathophysiology on this interaction and its impact on outcomes.MEDLINE and PubMed.The field of cardiac intensive care continues to advance in tandem with congenital heart surgery. As mortality has become a rare occurrence, the focus of cardiac intensive care has shifted to that of morbidity reduction. Acute kidney injury adversely impact outcomes of patients following surgery for congenital heart disease as well as in those with heart failure (cardiorenal syndrome). Patients who become fluid overloaded and/or require dialysis are at a higher risk of mortality, but even minor degrees of acute kidney injury portend a significant increase in mortality and morbidity. Clinicians continue to seek methods of early diagnosis and risk stratification of acute kidney injury to prevent its adverse sequelae.
View details for DOI 10.1097/PCC.0000000000000820
View details for PubMedID 27490607
Dexmedetomidine Is Associated With Lower Incidence of Acute Kidney Injury After Congenital Heart Surgery
PEDIATRIC CRITICAL CARE MEDICINE
2016; 17 (2): 128-134
Recent data have suggested an association between the use of dexmedetomidine and a decreased incidence of acute kidney injury in adult patients after cardiopulmonary bypass. However, no study has focused on this association among pediatric populations where the incidence of acute kidney injury is particularly high and of critical significance. The primary objective of this study was to assess the relationship between the use of postoperative dexmedetomidine and the incidence of acute kidney injury in pediatric patients undergoing cardiopulmonary bypass. The secondary objective was to determine whether there was an association between dexmedetomidine use and duration of mechanical ventilation or cardiovascular ICU stay.Single-center retrospective matched cohort study.A 20-bed quaternary cardiovascular ICU in a university-based pediatric hospital in California.Children less than 18 years old admitted after cardiac surgery with cardiopulmonary bypass between January 1, 2012, and May 31, 2014.None.Data from a cohort of 102 patients receiving dexmedetomidine during the first postoperative day after cardiac surgery were compared to an age- and procedure-matched cohort not receiving dexmedetomidine. Cohorts had similar baseline and demographic characteristics. Patients receiving dexmedetomidine were less likely to develop acute kidney injury (24% vs 36%; odds ratio, 0.54; 95% CI, 0.29-0.99; p = 0.046). After adjusting for age, bypass time, nephrotoxin use, and vasoactive inotropic score, the use of dexmedetomidine was associated with a lower incidence of acute kidney injury with adjusted odds ratio of 0.43 (95% CI, 0.27-0.98; p = 0.048). There was no difference between the cohorts with respect to the duration of mechanical duration (1 d each; p = 0.98) or cardiovascular ICU stays (5 vs 6 d; p = 0.91).The use of a dexmedetomidine infusion in pediatric patients after congenital heart surgery was associated with a decreased incidence of acute kidney injury; however, it was not associated with changes in clinical outcomes. Further prospective study is necessary to validate these findings.
View details for DOI 10.1097/PCC.0000000000000611
View details for Web of Science ID 000369672900004
View details for PubMedID 26673841
Training Pathways in Pediatric Cardiac Intensive Care: Proceedings From the 10th International Conference of the Pediatric Cardiac Intensive Care Society.
World journal for pediatric & congenital heart surgery
2016; 7 (1): 81-88
The increase in pediatric cardiac surgical procedures and establishment of the practice of pediatric cardiac intensive care has created the need for physicians with advanced and specialized knowledge and training. Current training pathways to become a pediatric cardiac intensivist have a great deal of variability and have unique strengths and weaknesses with influences from critical care, cardiology, neonatology, anesthesiology, and cardiac surgery. Such variability has created much confusion among trainees looking to pursue a career in our specialized field. This is a report with perspectives from the most common advanced fellowship training pathways taken to become a pediatric cardiac intensivist as well as various related topics including scholarship, qualifications, and credentialing.
View details for DOI 10.1177/2150135115614576
View details for PubMedID 26714998
Short QT Interval Prevalence and Clinical Outcomes in a Pediatric Population
CIRCULATION-ARRHYTHMIA AND ELECTROPHYSIOLOGY
2015; 8 (6): 1460-1464
Risk associated with short QT interval has recently received recognition. European studies suggest a prevalence of 0.02% to 0.1% in the adult population, but similar studies in pediatric patients are limited. We sought to determine the prevalence of short QT interval in a pediatric population and associated clinical characteristics and outcomes.Retrospective review of an ECG database at a single pediatric institution. The database was queried for ECGs on patients ≤21 years with electronically measured QTc of 140 to 340 ms. Patients with QTc of 140 to 340 ms confirmed by a pediatric electrophysiologist were identified for chart review for associated clinical characteristics, symptoms, and outcome. Patients with and without symptoms were compared in an attempt to identify variables associated with outcome. The query included 272 504 ECGs on 99 380 unique patients. Forty-five patients (35 men, 76%) had QTc ≤340 ms, for a prevalence of 0.05%. Median age was 15 years (interquartile range, 2-17), median QT 330 ms (interquartile range, 280-360), and median QTc 323 ms (IQR, 313-332). Women had significantly shorter QTc compared with men (312 versus 323 ms; P=0.03). Two deaths were noted in chart review--one from respiratory failure and the second of unknown pathogenesis in a patient with dilated cardiomyopathy.Short QT interval was a rare finding in this pediatric population, with a prevalence of 0.05%. Male predominance was identified, although the median QT interval was significantly shorter in women. There seem to be no unifying clinical characteristics for this pediatric patient cohort with short QT interval.
View details for DOI 10.1161/CIRCEP.115.003256
View details for Web of Science ID 000366604600022
View details for PubMedID 26386018
Acute Kidney Injury After Cardiovascular Surgery in Children
Perioperative Kidney Injury
Springer New York. 2015; 1: 99-109
View details for DOI 10.1007/978-1-4939-1273-5_8
Improved outcomes with peritoneal dialysis catheter placement after cardiopulmonary bypass in infants
JOURNAL OF THORACIC AND CARDIOVASCULAR SURGERY
2015; 149 (1): 230-236
Acute kidney injury (AKI) is common in infants after cardiopulmonary bypass and is associated with poor outcomes. Peritoneal dialysis improves outcomes in adults with AKI after bypass, but pediatric data are limited. This retrospective case-matched study was conducted to determine if the practice of peritoneal dialysis catheter (PDC) placement during congenital heart surgery is associated with improved clinical outcomes in infants at high risk for AKI.Forty-two infants undergoing congenital heart surgery with planned PDC placement (PDC+) were age-matched to infants undergoing similar surgery without PDC placement (PDC-). Demographic, baseline and outcome data were compared. Our primary outcome was negative fluid balance on postoperative days 1 to 3. Secondary outcomes included time to negative fluid balance, time to extubation, frequency of electrolyte corrective medications, inotrope scores, and other clinical outcomes.Baseline data did not differ between groups. The PDC+ group had a higher percentage of negative fluid balance on postoperative days 1 and 2 (57% vs 33%, P = .04; 85% vs 61%, P = .01). The PDC+ group had shorter time to negative fluid balance (16 vs 32 hours, P < .0001), earlier extubation (80 vs 104 hours, P = .02), improved inotrope scores (P = .04), and fewer electrolyte imbalances requiring correction (P = .03). PDC-related complications were rare.PDC use is safe and associated with earlier negative fluid balance and improved clinical outcomes in infants at high risk for AKI. Routine PDC use should be considered for infants undergoing cardiopulmonary bypass. Further prospective studies are essential to prove causative effects of PDC placement in this population.
View details for DOI 10.1016/j.jtcvs.2013.11.040
View details for Web of Science ID 000350550100066
View details for PubMedID 24503323
Handbook of Pediatric Cardiovascular Drugs
Springer London. 2014; 2: 6
View details for DOI 10.1007/978-1-4471-2464-1_6
Biomarkers of acute kidney injury in pediatric cardiac patients
BIOMARKERS IN MEDICINE
2012; 6 (3): 273-282
Acute kidney injury is a common and significant complication among pediatric patients with congenital heart disease, occurring most commonly after cardiopulmonary bypass. Current laboratory methods of diagnosis are not timely enough to guide management decisions, thus spurring interest in discovering new biomarkers of acute injury. Several promising candidates, including NGAL, IL-18 and KIM-1, have been the subject of recent investigation and may facilitate earlier and more accurate diagnosis of renal injury within this cohort. There is little evidence demonstrating that it will be possible to rely upon one particular biomarker as a single agent, and evidence supports that the use of biomarker panels will be most effective. Further clinical validation and broader commercial availability of these novel biomarkers will probably revolutionize the care of pediatric cardiac patients with renal injury.
View details for DOI 10.2217/BMM.12.27
View details for Web of Science ID 000306455100004
View details for PubMedID 22731900
The Utility of Outpatient Echocardiography for Evaluation of Asymptomatic Murmurs in Children
CONGENITAL HEART DISEASE
2012; 7 (3): 283-288
The purpose of this study is to review sedated outpatient echocardiograms performed to evaluate asymptomatic murmurs in children between the ages of 1 month and 4 years and describe outcomes of tests done to determine if utility varies among age of study and referral type (primary care physician vs. pediatric cardiologist.) We aim to describe the yield in a contemporary cohort which has increased availability and quality of diagnostic aids such as fetal ultrasound, newborn pulse oximetry, and neonatal echocardiography. Retrospective cohort study. Cincinnati Children's Hospital Medical Center: Outpatient Echocardiography Laboratory. Children between 1 month and 4 years of age with asymptomatic murmurs who are referred for outpatient echocardiogram for evaluation of murmur. Primary diagnosis of echocardiography studies, classified into severity score. Results. Four hundred sixty-two sedated echocardiograms were studied. Six (1%) echocardiograms showed severe pathology, and no severe pathology was shown in the echocardiograms ordered at the age of over 6 months old. The yield of studies decreased as age increased. The incidence of abnormal pathology was higher among tests ordered by cardiologists, across all severity levels (P < .0001). Among echocardiograms ordered for children over 1 year of age with an asymptomatic murmur, there was no severe and little moderate disease. Cardiac disease is significantly less likely when echocardiograms are ordered without referral to a pediatric cardiologist. The workup for asymptomatic murmurs does not require an echocardiogram, and these results may aid clinicians when deciding whether evaluation of a child should include this study.
View details for DOI 10.1111/j.1747-0803.2012.00637.x
View details for Web of Science ID 000304437100019
View details for PubMedID 22348237
A Teenager with Marfan Syndrome and Left Ventricular Noncompaction
2010; 31 (1): 132-135
We report a teenager with Marfan syndrome who presented to Cincinnati Children's Hospital Medical Center as part of a preoperative evaluation for an orthopedic procedure after asymptomatic arrhythmia was recognized. Continuous cardiac monitoring showed frequent premature ventricular contractions and nonsustained runs of ventricular tachycardia. Cardiac magnetic resonance imaging showed left ventricular noncompaction (LVNC), prompting insertion of an implantable cardiac defibrillator. Although Marfan syndrome is associated with cardiac lesions, it has not previously been described with LVNC. Likewise LVNC has been seen in association with other cardiac lesions; however, this report represents the first reference of LVNC in the context of Marfan syndrome.
View details for DOI 10.1007/s00246-009-9552-9
View details for Web of Science ID 000273675400027
View details for PubMedID 19795159
Catalytic asymmetric allylation of ketones and a tandem asymmetric allylation/diastereoselective epoxidation of cyclic enones
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
2004; 126 (39): 12580-12585
A simple procedure is reported for the catalytic asymmetric allylation of ketones, utilizing titanium tetraisopropoxide, BINOL, 2-propanol additive, and tetraallylstannane as allylating agent. A variety of ketone substrates, including acetophenone derivatives and alpha,beta-unsaturated cyclic enones, reacted to form tertiary homoallylic alcohols in good yields (67-99%) and with high levels of enantioselectivity (generally >80%). A novel one-pot enantioselective allylation/diastereoselective epoxidation has also been introduced. Thus, upon completion of the allyl addition to conjugated cyclic enones, 1 equiv of tert-butyl hydroperoxide is added and the directed epoxidation of the allylic double bond ensues to afford the epoxy alcohol with high diastereoselectivity.
View details for DOI 10.1021/ja047758t
View details for Web of Science ID 000224219900077
View details for PubMedID 15453790
Antimitogenic effects of HDL and APOE mediated by cox-2-dependent IP activation
JOURNAL OF CLINICAL INVESTIGATION
2004; 113 (4): 609-618
HDL and its associated apo, APOE, inhibit S-phase entry of murine aortic smooth muscle cells. We report here that the antimitogenic effect of APOE maps to the N-terminal receptor-binding domain, that APOE and its N-terminal domain inhibit activation of the cyclin A promoter, and that these effects involve both pocket protein-dependent and independent pathways. These antimitogenic effects closely resemble those seen in response to activation of the prostacyclin receptor IP. Indeed, we found that HDL and APOE suppress aortic smooth muscle cell cycle progression by stimulating Cox-2 expression, leading to prostacyclin synthesis and an IP-dependent inhibition of the cyclin A gene. Similar results were detected in human aortic smooth muscle cells and in vivo using mice overexpressing APOE. Our results identify the Cox-2 gene as a target of APOE signaling, link HDL and APOE to IP action, and describe a potential new basis for the cardioprotective effect of HDL and APOE.
View details for DOI 10.1172/JCI200419097
View details for Web of Science ID 000189008000016
View details for PubMedID 14966570