P Matt

Universitätsspital Basel, Basel, BS, Switzerland

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Publications (8)11.93 Total impact

  • Article: Heart failure resulting from giant left atrial synovial sarcoma metastasis.
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    ABSTRACT: Synovial sarcoma metastasis affecting the heart and infiltrating the mitral valve is a very rare pathology. We report the case of a 44-year-old male treated with chemotherapy for atypical synovial sarcoma of the oral mucosa who presented to our clinic after cardiac decompensation with a presumptive diagnosis of myxoma of the left atrium. A large necrotic tumour positive for CK 22, EMA, CD 99 and BCL-2 but negative for translocation in COBRA-FISH analysis by break-apart probe could be excised and revealed a very rare subtype of synovial sarcoma metastasis arising from the endocard of the left atrium. The tumour was resected and the mitral valve reconstructed through ring annuloplasty.
    The Thoracic and Cardiovascular Surgeon 03/2011; 60(1):84-6. · 0.88 Impact Factor
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    Article: Impact of female gender on the early outcome in off-pump coronary artery bypass surgery.
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    ABSTRACT: Female gender is an independent risk factor for adverse outcome after conventional coronary bypass surgery (CABG). The objective of this retrospective study was to evaluate the influence of the gender on the early outcome in "off pump" coronary bypass surgery without extracorporeal circulation (OPCAB). Between January 2001 and December 2003, a total of 225 patients, 49 female and 176 male, underwent OPCAB surgery for multivessel disease at our institution. Operations were performed by the same surgeon. The relationship between OPCAB surgery and clinical outcome with major and minor adverse events was assessed with univariate analysis. The same operative technique was applied for both female and male patient groups. No conversion to conventional CABG with cardiopulmonary bypass was necessary. The overall in-hospital mortality was 1.3% (3 of 225 patients), all of them in the male patient group (p = 0.08). Female patients showed a lower rate of postoperative atrial fibrillation than male patients (6% vs. 15%; p = 0.08). The incidence for further postoperative complications such as rethoracotomy for bleeding, stroke, delirium, pneumonia and wound infection was identical and statistically not different in both groups. In OPCAB surgery, female gender plays not a predictive role for postoperative adverse events and complications influencing morbidity and mortality. In selected female patients OPCAB surgery has a beneficial effect on early clinical outcome.
    European journal of medical research 04/2006; 11(3):114-8. · 1.13 Impact Factor
  • Article: Protecting the endothelial integrity of internal thoracic arteries.
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    ABSTRACT: Previous functional studies on human internal thoracic arteries, comparing the effect of the traditional harvesting method (occlusion with a clip) with a method leaving the artery perfused, revealed considerably impaired endothelial function associated with enhanced contractility after clipping. We have now investigated whether these observations could be correlated (1) with plasma markers of endothelial dysfunction, and (2) with structural changes in the endothelial layer. 32 patients were randomly distributed into groups of clipped and perfused arteries. Arterial blood samples were obtained from both the artery and extracorporeal circulation to determine sP-selectin, sE-selectin, sL-selectin, and thrombomodulin using enzyme-linked immunosorbent assay. Arteries from three patients were examined by scanning electron microscopy. Concentrations of sP-selectin and thrombomodulin were significantly higher in plasma from clipped arteries compared to perfused arteries, whereas sE-selectin and sL-selectin concentrations were similar within the groups. Scanning electron microscopy revealed significant structural changes and loss of endothelial cells in clipped arteries. Biochemical and structural results support our findings that leaving the internal thoracic artery perfused preserves endothelial function in the arterial graft.
    The Thoracic and Cardiovascular Surgeon 01/2006; 53(6):352-7. · 0.88 Impact Factor
  • Article: Short- and long-term outcome after lung resection for invasive pulmonary aspergillosis.
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    ABSTRACT: Lung resection for invasive pulmonary aspergillosis (IPA) is controversial. Neutropenia, thrombopenia and poor general condition may increase perioperative morbidity and mortality, and the redeeming benefit is questionable. Therefore we analyzed short- and long-term outcome after lung resection for IPA. 41 patients with hematological disease underwent lung resection for suspected IPA: lobectomy (23 patients), wedge-resection (16) and enucleation (2). 4 (10%) patients developed major complications: pleural aspergillosis, bronchial stump insufficiency, severe bleeding, ARDS. 11 (27%) patients showed minor complications: pleural effusion (6), pneumothorax (2), seroma (2) and hematothorax (1). 30-day mortality was 10 % (4 of 41 patients): two died of bacterial septicemia, two of disseminated aspergillosis. One (2%) death was possibly surgery-related. IPA was cleared in 87% of patients, fungal relapse occurred in 4 (10%) patients. Overall survival was 65%, 58% and 40% at 6 months, 12 months and 5 years. Lung resection for IPA even in profound cytopenia is feasible with acceptable morbidity and mortality. Fungal infection can be cured in more than 80 % of patients. Long-term outcome can be achieved if the hematological disease is under control.
    The Thoracic and Cardiovascular Surgeon 09/2003; 51(4):221-5. · 0.88 Impact Factor
  • Article: Invasive pulmonary aspergillosis: effects of early resection in a neutropenic rat model.
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    ABSTRACT: Invasive pulmonary aspergillosis is frequent in neutropenic patients. Usually localized in the beginning, the disease spreads and mortality is high despite antifungal treatment. The role of early adjuvant surgery is not clear. Surgery may help to confirm fungal disease, may control fungal disease locally and may prevent systemic spreading. This study examines effects of early resection on survival and dissemination in a rat model of localized invasive pulmonary aspergillosis. Forty persistently neutropenic male albino rats were challenged with standardized conidial aspergillus inoculum injected into peripheral lung tissue of the right upper lobe under direct vision. Animals were divided into four groups. Twenty animals were treated with amphotericin B at 1 mg/kg per day beginning 48 h after inoculation, 20 animals were left untreated. In each group half the animals underwent early resection of localized invasive aspergillosis by lobectomy. Animals were checked daily and mortality was recorded up to 28 days after which surviving animals were sacrificed. Significantly higher survival was observed in resected animals in the non-Am B groups (survival: 10 +/- 19% without early resection and 50 +/- 32% with early resection; P = 0.044). However, early resection did not lead to improved survival in animals treated with amphotericin B (survival 70 +/- 29% without early resection and 50 +/- 32% with early resection; P = 0.316). In this rat model of localized invasive pulmonary aspergillosis effects of early resection on survival could be demonstrated only in animals not receiving amphotericin B treatment.
    European Journal of Cardio-Thoracic Surgery 12/2002; 22(5):728-32. · 2.55 Impact Factor
  • Article: Invasive pulmonary fungal infection in hematologic patients: is resection effective?
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    ABSTRACT: Invasive pulmonary aspergillosis carries a high mortality in neutropenic patients. Descriptive reports have shown early surgery to be feasible with acceptably low morbidity. The possible benefit of surgery has not been investigated in comparative studies. In a retrospective cohort study encompassing a 15-year period, 54 (8%) of 697 consecutive patients with severe hematological disease required treatment for localized invasive pulmonary aspergillosis. Patients treated by antifungal drugs (medical group, n = 24) were compared to patients treated with additional early lung resection (surgical group, n = 30). Outcomes analysed were fungal progression and survival. Fungal progression at six months was 17% (95% CI 3-31) in the surgical group and 52% (95% CI 34-73) in the medical group (P = 0.005). Survival at six months was 70% (95% CI 53-87) in surgically and 42% (95% CI 24-62) in medically treated patients (P = 0.009). Adjusting for differences in WHO performance score (worse in the medical group) and duration of neutropenia (longer in the surgical group) in a multivariate analysis, a difference in relative risk of death (0.26; 95% CI 0.08-0.88; P = 0.03) remained in favor of surgery. In this retrospective study surgical intervention to treat invasive pulmonary fungal disease appeared to have a beneficial effect on the impact of disease control and survival. Differences in baseline characteristics of the two patient groups calls for cautious interpretation. A prospective randomized trial seems warranted.
    The Hematology Journal 02/2001; 2(4):250-6. · 1.86 Impact Factor
  • Article: Diagnostic yield of bronchoscopy in histologically proven invasive pulmonary aspergillosis.
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    ABSTRACT: Invasive pulmonary aspergillosis (IPA) is a life-threatening infectious complication in neutropenic patients after high-dose chemotherapy or hematopoietic stem cell transplantation. Its diagnosis is mainly based on clinical symptoms, and radiological signs on thoracic CT scan. The value of bronchoscopy is controversial. We analyzed the diagnostic yield of bronchoscopy in 23 consecutive patients with histologically proven invasive pulmonary aspergillosis. In seven patients (30%) bronchoscopically obtained specimens were diagnostic for pulmonary fungal infection. Typical hyphae were detected by cytology in six patients and fungal cultures were positive in four cases. Patients with a positive bronchoscopic result presented more often with multiple changes on thoracic CT scan (71%; 5/7), but had received a lower median cumulative dose of amphotericine B (300 mg; 168-3010 mg) compared to patients with non-diagnostic bronchoscopy (25% multiple lesions (4/16); amphotericine dose 1100 mg, 260-2860 mg). The diagnostic yield of bronchoscopy was not associated with clinical symptoms or duration of neutropenia. Bronchoscopy allows the diagnosis of IPA in about one third of patients. Fungal cultures and cytological examination of intrabronchial specimens obtained during bronchoscopy have a high specificity, but its sensitivity is low. It is advisable to perform diagnostic bronchoscopy before starting antifungal therapy. Better diagnostic tools are urgently needed.
    Bone Marrow Transplantation 01/2000; 24(11):1195-9. · 3.75 Impact Factor
  • Article: Invasive pulmonary aspergillosis: effects of early resection in a neutropenic rat model
    [show abstract] [hide abstract]
    ABSTRACT: Objective: Invasive pulmonary aspergillosis is frequent in neutropenic patients. Usually localized in the beginning, the disease spreads and mortality is high despite antifungal treatment. The role of early adjuvant surgery is not clear. Surgery may help to confirm fungal disease, may control fungal disease locally and may prevent systemic spreading. This study examines effects of early resection on survival and dissemination in a rat model of localized invasive pulmonary aspergillosis. Methods: Forty persistently neutropenic male albino rats were challenged with standardized conidial aspergillus inoculum injected into peripheral lung tissue of the right upper lobe under direct vision. Animals were divided into four groups. Twenty animals were treated with amphotericin B at 1 mg/kg per day beginning 48 h after inoculation, 20 animals were left untreated. In each group half the animals underwent early resection of localized invasive aspergillosis by lobectomy. Animals were checked daily and mortality was recorded up to 28 days after which surviving animals were sacrificed. Results: Significantly higher survival was observed in resected animals in the non-Am B groups (survival: 10±19% without early resection and 50±32% with early resection; P=0.044). However, early resection did not lead to improved survival in animals treated with amphotericin B (survival 70±29% without early resection and 50±32% with early resection; P=0.316). Conclusions: In this rat model of localized invasive pulmonary aspergillosis effects of early resection on survival could be demonstrated only in animals not receiving amphotericin B treatment.
    European Journal of Cardio-Thoracic Surgery.