Publications by authors named "Ryoji Yanagisawa"

Objective: To evaluate the safety and efficacy of balloon pulmonary angioplasty (BPA) in patients with chronic thromboembolic pulmonary hypertension (CTEPH) seen at a US medical center.

Patients And Methods: Patients with inoperable or residual postendarterectomy CTEPH who underwent BPA at Mayo Clinic in Rochester, Minnesota, between August 11, 2014, and May 17, 2018, were included. Invasive hemodynamic, clinical, laboratory, and echocardiographic data were collected and analyzed retrospectively.

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Background: The present comparative study with healthy volunteers was conducted to investigate the depressive status and temperament in patients with chronic thromboembolic pulmonary hypertension (CTEPH).Methods and Results:The results of the temperament and personality scale test, and the Quick Inventory of Depressive Symptomatology-Self Report revealed that CTEPH patients have a significantly higher depressive status than healthy volunteers.

Conclusions: It may be that CTEPH patients are more likely to have a depressive temperament in origin.

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Introduction: Percutaneous transluminal pulmonary angioplasty (PTPA) was introduced for the treatment of chronic thromboembolic pulmonary hypertension (CTEPH) in the late 20(th) century, and first attempts in collective patients were made in 2001 with beneficial effects but a moderate amount of complications. It was refined around 2010, and has been recently established as an effective and safe treatment.

Areas Covered: The indication was originally inoperable CTEPH with peripheral lesions, but has now widened to symptomatic or hypoxic patients.

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Background: Pulmonary endarterectomy (PEA) has been the most effective therapy for chronic thromboembolic pulmonary hypertension (CTEPH). However, residual or recurrent pulmonary hypertension often persists after PEA. Recently, catheter-based angioplasty, called percutaneous transluminal pulmonary angioplasty (PTPA) or balloon pulmonary angioplasty, has been developed as a promising strategy for CTEPH.

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Article Synopsis
  • Plasma amino acid concentrations show unique patterns in various diseases, but the specific patterns in pulmonary hypertension (PH) have not been thoroughly studied.
  • Researchers analyzed fasting plasma aminograms from 140 PH patients and found significant differences in amino acid levels when compared to healthy individuals.
  • The Fischer ratio, which compares branched-chain to aromatic amino acids, was found to be negatively correlated with clinical severity markers, suggesting that a lower Fischer ratio indicates worse outcomes in PH patients.
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Objectives: This study sought to prove the safety and effectiveness of pressure-wire-guided percutaneous transluminal pulmonary angioplasty (PTPA).

Background: PTPA has been demonstrated to be effective for treatment of chronic thromboembolic pulmonary hypertension. However, a major and occasionally fatal complication after PTPA is reperfusion pulmonary edema.

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Background: Percutaneous transluminal pulmonary angioplasty (PTPA) is a recently developed catheter-based therapy for chronic thromboembolic pulmonary hypertension (CTEPH). The aim of the present study was to investigate the safety and efficacy of PTPA in elderly patients with CTEPH.

Methods: In all, 257 PTPA sessions in 70 patients (median age 63 years) were analyzed.

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Objectives: This study sought to identify useful predictors for hemodynamic improvement and risk of reperfusion pulmonary edema (RPE), a major complication of this procedure.

Background: Percutaneous transluminal pulmonary angioplasty (PTPA) has been reported to be effective for the treatment of chronic thromboembolic pulmonary hypertension (CTEPH). PTPA has not been widespread because RPE has not been well predicted.

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Purpose: The purpose of this study was to undertake thorough genetic analysis of the bone morphogenetic protein type 2 receptor (BMPR2) gene in patients with pulmonary arterial hypertension.

Methods: We conducted a systematic analysis for larger gene rearrangements together with conventional mutation analysis in 152 pulmonary arterial hypertension patients including 43 patients diagnosed as having idiopathic pulmonary arterial hypertension and 10 diagnosed as having familial pulmonary arterial hypertension.

Results: Analysis of the BMPR2 gene revealed each of the four kinds of nonsense and frameshift mutations, one missense mutation, one splice-site mutation, and two types of exonic deletion.

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The present study is the first report of the effectiveness of sorafenib in the treatment of pulmonary veno-occlusive disease (PVOD). A 66-year-old woman with PVOD was started on sorafenib. After 3 months of treatment with a maximum dosage of 400 mg/day sorafenib, there was an improvement in the patient's New York Heart Association (NYHA) functional class from IV to III.

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Aims: Many patients with idiopathic dilated cardiomyopathy (DCM) have been diagnosed on the basis of the exclusion of significant coronary stenosis and the presence of left ventricular (LV) dysfunction. In the present study, we investigated the possibility that coronary multispasm is one of the mechanisms leading to diffuse idiopathic DCM-like LV dysfunction.

Methods And Results: Forty-two patients with severely depressed LV function but without significant coronary stenosis were enrolled (baseline LV ejection fraction, 33 ± 11%).

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Background: The recent development of various effective drugs, such as epoprostenol, sildenafil, and bosentan, has improved the prognosis for patients with idiopathic pulmonary arterial hypertension (IPAH). This study sought to determine survival rates and to identify predictive prognostic factors in patients with IPAH in the current era of combination therapy with new and more effective vasodilators.

Methods And Results: In 65 consecutive IPAH patients treated from 2004 to 2009, hemodynamic parameters were significantly improved and brain natriuretic peptide was significantly decreased by combination therapy (observation period: 35±18 months).

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Background: Sildenafil has been demonstrated as effective for the treatment of pulmonary arterial hypertension (PAH). The purpose of this study was to investigate the occurrence of clinical events after sildenafil monotreatment as a first-line therapy in patients with PAH over a long-term observation period.

Methods And Results: Sildenafil was administered as a first-line drug to 46 patients with PAH (including 24 patients with idiopathic PAH) during 2003-2010.

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Background: Previous studies have described the clinical utility of heart rate turbulence (HRT) as an autonomic predictor in risk-stratifying patients after myocardial infarction (MI). Some reports showed that diabetes mellitus (DM) affects the prognostic value of autonomic markers. We assessed the utility of HRT as a risk marker in post-MI patients with DM and without DM.

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Background: Occasionally it is difficult to inhibit electrical storm (ES) with standard pharmacological treatment. In the present study the effect of landiolol, an ultra-short-acting beta(1)-selective blocker, on ES refractory to class III antiarrhythmic drugs was evaluated.

Methods And Results: The study group comprised 42 consecutive patients who developed ES for which intravenous class III antiarrhythmic drugs, such as amiodarone and nifekalant, were ineffective.

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