The role of cerebral blood flow (CBF) on a maximal breath-hold (BH) in ultra-elite divers was examined. Divers (n = 7) performed one control BH, and one BH following oral administration of the non-selective cyclooxygenase inhibitor indomethacin (1.2 mg/kg). Arterial blood gases and CBF were measured prior to (baseline), and at BH termination. Compared to control, indomethacin reduced baseline C...

Proof. The result follows by direct manipulation of the terms. Lemma S2 Suppose that the k×k matrices A and B have bounded spectral norms ‖A‖ ≤ λ and ‖B‖ ≤ λ, for some fixed positive constant λ. Then ∥∥∥Ah −Bh∥∥∥ ≤ hλh−1 ‖A−B‖ , for h = 1, 2, .... (A.1) Proof. We establish this result by backward induction. It is clear that it holds for h = 1. For h = 2, using the identity A −B = A(A−B) + (A−B)...

Aim. To comparably assess the perioperative risk factors that differentiate off-pump coronary artery bypass (OPCAB) grafting cases from those sustaining unplanned conversion to on-pump beating heart (ONCAB/BH) approach, in patients with left ventricular ejection fraction (LVEF) < 40%. Methods. Perioperative variables were retrospectively assessed in 216 patients with LVEF < 40%, who underwent m...

The synthesis, characterization, and reactivity of a chromium(0) complex bearing an amine-borane moiety (η(6)-C(6)H(5)CH(2)NMe(2)·BH(3))Cr(CO)(3) (2) is reported. Photolysis of complex 2 results in the elimination of a CO ligand followed by the formation of an intramolecular σ-borane complex (η(1)-(η(6)-C(6)H(5)CH(2)NMe(2)·BH(2)-H))Cr(CO)(2) (3). This species was characterized in solution by NM...

AIM OF STUDY To analyze the association between anterior chamber depth (ACD) and age, sex, and body height (BH). MATERIALS AND METHODS One thousand four hundred eighty eyes of 1480 adults 40 years of age and older receiving preoperative evaluation for cataract surgery were recruited consecutively from June 1, 2006, to December 31, 2010. ACD was measured with the Zeiss IOLMaster. Univariate an...

Breath holding (BH) endurance has been suggested as a measure of the distress tolerance that could predict the outcome of attempts to implement behavior changes, such as stopping smoking or illicit substance use. It is not known however, to what degree BH endurance is a variable trait that may vary depending on situational context, or a stable state characteristic. We measured BH in two groups ...

PURPOSE We propose a respiratory-correlated PET data processing method (called "BH-CT-based") based on breath-hold CT acquisition to reduce the smearing effect and improve the attenuation correction. The resulting images are compared with the ungated PET images acquired using a standard, free-breathing clinical protocol. METHODS The BH-CT-based method consisted of a list-mode acquisition with...

We calibrate reverberation-based black hole (BH) masses in active galactic nuclei (AGNs) by using the correlation between BH mass,MBH, and bulge/spheroid stellar velocity dispersion, . We use new measurements of for six AGNs and published velocity dispersions for 10 others, in conjunction with improved reverberationmapping results, to determine the scaling factor required to bring reverberation...

Bochdalek hernia (BH) is a congenital defect of the diaphragm that usually presents in the neonatal period with life threatening cardiorespiratory distress. It is rare for BH to remain silent until adulthood. A 51-year-old woman presented with progressive dyspnea and abdominal symptoms, but without a history of trauma. The diagnosis of BH was made based on chest X-ray and CT. The hernia was rep...

Fourteen patients with conduction defects were analyzed by using bundle of His (BH) recordings. The BH electrograms were validated by BH and right atrial pacing (AP). In 12 patients with Mobitz type II A-V block, failure in impulse transmission for the dropped beats was localized distal to the recording site of the BH. Three of these 12 patients showed normal QRS complexes. In two of these thre...