Constriction of the aorta, as in COA, produces resistance to the flow of blood, resulting in raising the blood pressure above the narrowing and reducing blood pressure below or downstream from the narrowing.
Among the consequences of COA is an enlargement of the left ventricle (ventricular hypertrophy) in response to increased back-pressure of the blood and the demand for more blood by the lower body.
In asymptomatic children with COA, the descending aorta receives left ventricle blood through the ascending aorta; these children have fewer, if any, associated cardiac abnormalities.
COA can produce symptoms of congestive heart failure or high blood pressure (hypertension) as early as the first week of life or may produce no symptoms until later in life.
More Portuguese troops had been raised, and reinforcements received from England, so that the Allies, without the Spaniards above alluded to, now numbered some 75,000 men, and from near the Coa watched the Douro and Tormes, their line stretching from their left near Lamego to the pass of Banos, Hill being on the right.
Aristotle's vague knowledge of the worm may have been derived from information acquired by the Greeks with Alexander the Great; but long before this time raw silk must have begun to be imported at Cos, where it was woven into a gauzy tissue, the famous Coa vestis, which revealed rather than clothed the form.
36, if OA, OB, OC be three mutually perpendicular lines in the solid, we may denote by O the angle which OC makes with a fixed direction OZ, by ~ the azimuth of the plane ZOC measured from some fixed plane through OZ, and by f~ the inclination of the plane COA to the plane ZOC In fig.
Lesser ranges, which are included in the Beirene system and vary in height from 2000 to 4000 ft., are the Mesas, between the rivers Coa and Zezere; the Guardunha and Moradal, separating the Zezere from the Ponsul and Ocreza, tributaries of the Tagus; the Serra do Aire, and various ridges which stretch south-westward as far as the mountains of Cintra (q.v.).
The chief Portuguese tributaries of the Douro are the Tamega, Tua and Sabor on the north, the Agueda, Coa and Paiva on the south; of the Tagus, the Ocreza, Ponsul and Zezere on the north, the Niza and Sorraia on the south, while into the Guadiana, on its right or Portuguese bank, flow the Caia, Degebe, Cobres, Oeiras and Vascao.
Dry Cura coa contains about 39%, the sweet variety about 36% of alcohol.