Suppressive effect of pitavastatin on aortic arch dilatation in acute stanford type B aortic dissection: analysis of STANP trial
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Medical therapy for patients with uncomplicated acute type B aortic dissection (ABAD) is essentially accepted for its excellent early outcome; however, long-term outcomes have not been satisfactory due to aorta-related complications. This trial was performed to investigate the efficacy of a statin as an additive that may enhance the effectiveness of conventional medical treatment in patients with ABAD.
This was a multi-center, prospective, and randomized comparative investigation of patients with uncomplicated ABAD. Fifty patients with ABAD compatible with inclusion criteria were randomly assigned to two groups and then received administration of pitavastatin (group P) or not (group C). We followed up the patients for 1 year from study onset.
Two patients demised during the follow-up period (both were in group C). In addition, aorta-related interventions were performed in two patients (entry closure for aortic dissection by endovascular repair in one patient in each group). Aortic arch diameters at 1 year in group P tended to be smaller than in group C (P = 0.17), and the rate of change of the aortic arch diameters from onset to 1 year was significantly lower in group P (P = 0.046). Multivariate analysis identified patency of the false lumen was detected as a risk factor for aortic arch dilatation (P = 0.02), and pitavastatin intake was a negative risk factor (P = 0.03).
Pitavastatin treatment, in addition to the standard antihypertensive therapy, may have a suppressive effect on aortic arch dilatation in patients with ABAD.
KeywordsAcute type B aortic dissection Medical treatment Pitavastatin
List of all contributors to the STANP trial. Division of Epidemiology, Department of Public Health and Forensic Medicine, Tohoku University Graduate School of Medicine: Yumi Sugawara, PhD; Department of Radiology, Tohoku University Graduate School of Medicine: Hidenobu Takagi, MD, PhD, Satoshi Higuchi, MD, Hideki Ota, MD, PhD, Kei Takase, MD, PhD; Department of Thoracic and Cardiovascular Surgery, Hirosaki University Graduate School of Medicine: Kazuyuki Daitoku, MD, PhD, Ikuo Fukuda, MD, PhD; Department of Cardiovascular Surgery, Hirosaki Central Hospital: Hiroyuki Itaya, MD, PhD; Department of Cardiovascular Surgery, Tohoku Medical and Pharmaceutical University Hospital: Suguru Watanabe, MD, PhD; Department of Cardiovascular Surgery, Sendai Open Hospital: Seijiro Yoshida, MD, PhD; Department of Cardiovascular Surgery, Sendai Kousei Hospital: Masaki Hata, MD; Department of Cardiology, Sendai Kousei Hospital: Norio Tada, MD, PhD; Department of Cardiovascular Surgery, Aomori Prefectural Central Hospital: Koichi Nagaya, MD, PhD; Department of Cardiovascular Surgery, Iwate Prefectural Central Hospital: Katsuhiko Oda, MD, PhD; Department of Cardiovascular Surgery, Mito Medical Center: Kei Sakuma, MD, PhD; Department of Cardiovascular Surgery, Sendai City Hospital: Tetsuo Watanabe, MD, PhD.
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Conflict of interest
The authors have no potential conflicts of interest.
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