This paper describes the design, construction and operation of an electronic network providing an analogue of the behaviour of up to twelve coupled, second-order, linear differential equations. It was designed specifically for the solution of problems in aircraft flutter investigations but can be used for other associated problems or where a problem can be expressed in similar form. Section 1. 2.

OBJECTIVE To assess the association between atrial fibrillation and flutter and use of bisphosphonates for osteoporosis among women. DESIGN Population based case-control study, using medical databases from Denmark. SETTING Northern Denmark. PARTICIPANTS 13 586 patients with atrial fibrillation and flutter and 68 054 population controls, all with complete hospital and prescription history....

Three time-domain damping/frequency/flutter identification techniques are discussed; namely, the moving-block approach, the least-squares curve-fitting method, and a system-identification technique using an autoregressive moving-average model of the aeroelastic system. These methods are evaluated for use with time-intensive computational aeroelastic simulations, represented by the aeroelastic t...

Two patients, ages 14 and 18, with congenital left ventricular-right atrial communication through a defect in the tricuspid valve were studied by echocardiography. Proof was obtained by angiocardiography and surgery in one and ultrasonic contrast injection and angiocardiography in the other. Both presented clinically as uncomplicated ventricular septal defects. Echocardiography consistently dem...

AIMS We sought to compare the predictive power and reproducibility between minimum and maximum left atrial (LA) volume for the development of first atrial fibrillation (AF)/flutter. METHODS AND RESULTS This prospective study included 574 adults, mean age 74+/-6 years, in sinus rhythm, and had no history or evidence of prior atrial arrhythmias. During a mean follow-up of 1.9+/-1.2 years, 30 (5...

axial vibration effect of shell particles on dynamic stability of a cantilevered cylindrical shell under an axial follower force was addressed. in spite of free-ended shells, the reduced axial force under this effect cannot be derived analytically. instead, an approximate method was proposed based on the fact that the static (and harmonic) axial deformation under an axial load in a free-ended b...

Respiratory flutter or diaphragmatic flutter is a rare disorder characterized by involuntary, high frequency contractions of the diaphragm. Only 7 cases are reported in infants till date. The present case presented with life threatening respiratory distress immediately after birth. In view of high respiratory rate of 120-154 per minute, clinical and fluoroscopic evidence of diaphragmatic contra...

Fetal atrial flutter (AF) is the second common fetal tachyarrhythmias that exist in less than 1% of all pregnancies. It may be related to congestive heart failure, hydrops, neurologic morbidity, or intrauterine death. Early detection and treatment are crucial for getting better neonatal outcomes. We presented a case of fetal atrial flutter diagnosed in the 36th week of gestation and managed suc...