Background: Pulse pressure has recently been considered as a predictor of coronary heart disease. The difference between systolic and diastolic blood pressure is called pulse pressure. Various factors including increased age, vascular stiffness, stenosis, and hypertension are associated with pulse pressure. The present study, therefore, aimed to investigate the relationship between some cardiov...

Moderate to severe arterial oxygen desaturation (SaO2 75-88%) occurred in three of four patients who were given sedation during regional conduction block without the administration of oxygen. No desaturation occurred in six patients given oxygen 2 litre min-1 via a nasal catheter during similar procedures. It is concluded that patients undergoing regional conduction block with concurrent sedati...

We have studied the interactions of Ba ion with K channels. Ba2+ blocks these channels when applied either internally or externally in millimolar concentrations. Periodic depolarizations enhance block with internal Ba2+, but diminish the block caused by external Ba2+. At rest, dissociation of Ba2+ from blocked channels is very slow, as ascertained by infrequent test pulses applied after washing...

BACKGROUND We compared the efficacy of combined posterior lumbar plexus-sciatic nerve block with that of combined femoral-obturator-sciatic nerve block as anesthesia for anterior cruciate ligament reconstruction surgery, because both block combinations have been recommended for lower limb arthroscopic and reconstructive surgery. METHODS Forty-eight patients undergoing elective unilateral ante...

We theoretically propose a new procedure of designing quasi-phase-matching (QPM) gratings for compressing optical ultra-short pulses during second-harmonic generation. The grating consists of blocks of crystal with same block length and the direction of spontaneous polarization of each block is determined by optimal algorithm, by which the sign of the nonlinear coefficient of each block is opti...

Since the work of Wolferth and Margolies (1935), the modifications of both the heart sounds and the sequence of ventricular events induced by left bundle-branch block have been well known. Yet there has been some disagreement on details, mainly because left bundle-branch block is seldom aft isolated abnormality. The opportunity was offered to record the heart sounds, the indirect carotid pulse,...

background & objective: outpatient surgery can be performed by general or spinal anesthesia. spinal anesthetic drugs have side effects. many anesthesiologists choose general anesthesia, because of its relative predictability and to avoid undesirable side effects associated with spinal anesthesia. for example lidocaine is frequently associated with transient neuroligic symptoms (tns). bupivacain...

The characteristics of near-fault ground motion are investigated considering heterogeneous slip distribution on the fault plane. Areas on the fault plane with large slip in compare with the average slip on the fault are known as asperity. The characteristics of strong ground motions in near-fault area are strongly affected by faulting parameters such as asperity location, maximum slip of asperi...