Pavit Pienvichit

Ramathibodi Hospital, Krung Thep, Bangkok, Thailand

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Publications (4)6.06 Total impact

  • [Show abstract] [Hide abstract]
    ABSTRACT: Recent advances in stem cell therapy to restore cardiac function have great promise for patients with congestive heart failure after myocardial infarction in an adult population. We examined the benefits of bone marrow-derived progenitor cells treatment modality for the pediatric patient. We present our first case of transcoronary autologous stem cell transplantation in a 9-year-old girl with refractory congestive heart failure secondary to myocardial infarction 1 year after transcatheter revascularization. The child received daily injections of granulocyte colony-stimulating factor for 3 days prior to the bone marrow aspiration. The bone marrow cells were isolated to constitute CD133+/CD34+ more than 90% of the total number. Subsequently, the progenitor cell suspension was injected via a transcoronary catheter without any complication. Three months after stem cell therapy, her cardiac function, assessed by both cardiac magnetic resonance and echocardiogram, has been improved with the left ventricular ejection fraction at 47% compared to the baseline of 30%. This is the first reported pediatric case of successful transcoronary injection of bone marrow-derived progenitor cells for end-stage heart disease. The procedure is considered safe and feasible for the pediatric population.
    Clinical Cardiology 08/2010; 33(8):E7-12. · 1.83 Impact Factor
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    ABSTRACT: Myocardial damage after myocardial infarction (MI) was deemed irreversible after late reperfusion. Administration of multipotent stem cell (MSC) into such infarct may regenerate the myocardium and capillary network. Transcoronary infusion of bone marrow derived multipotent stem cells into infarcted related artery after acute myocardial infarction is feasible, safe and improve left ventricular function. We conducted a pilot study in patients who survived ST-elevation MI with late reperfusion therapy and remained hemodynamically stable. Bone marrow derived MSC was infused into a patent infarct-related coronary artery during brief low pressure (2 atm) balloon inflation. A 3-T gadolinium-based MRI was performed at baseline and 8 weeks later to evaluate infarct area and LV function. We enrolled 10 patients, age 63.8 +/- 2.8 years 5.2 +/- 4.12 x 10(6) MSC were infused via coronary artery 24.8 +/- 16 days after infarction. The procedures were successful in all patients without any in-hospital event. Infarct size by MRI decreased by 5.84% (P = .018) over 8 weeks. Mean baseline left ventricular ejection fraction (LVEF) was 44.1% +/- 9% and was 46.3% +/- 9% at 8 weeks (P = .34). A trend of smaller LV end-systolic volume with 65.02 +/- 18.2 ml vs 63.04 +/- 21.89 ml (P = .09) with no change of LV end-diastolic volume observed. MSC infusion into coronary circulation was feasible and safe after myocardial infarction. Infarct size was reduced with preservation of LV geometry.
    Clinical Cardiology 07/2010; 33(7):E10-5. · 1.83 Impact Factor
  • A Limsuwan, P Khowsathit, P Pienvichit
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    ABSTRACT: Takayasu's arteritis (TA) is a chronic systemic inflammatory disease that usually affects the aorta and its primary branches and occasionally the coronary arteries. We report the case of an 8-year-old girl who was presented with chest pain and was referred to our institution with the presumptive diagnosis of pneumonia and sepsis. Ultimately, the patient's chest pain was attributed to myocardial infarction secondary to coronary occlusion from TA. She underwent a successful stenting of the left main coronary artery with sirolimus-eluting stent. In a review of the literature, we discuss the demographic profile, clinical and radiographic findings, and available therapeutic options.
    Pediatric Cardiology 01/2007; 28(3):234-7. · 1.20 Impact Factor
  • A Limsuwan, P Pienvichit, P Khowsathit
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    ABSTRACT: We present a report on children with severe pulmonary hypertension secondary to congenital heart disease who received 6 months of beraprost therapy. The children had an increase in intracardiac left-to-right shunt and a reduction of the pulmonary-to-systemic vascular resistance ratio, whereas the pulmonary artery pressure was not significantly changed.
    Pediatric Cardiology 26(6):787-91. · 1.20 Impact Factor