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With a narrowed (stenosed) AV valve it is more difficult (requires more pressure) for the blood to pass from atrium to ventricle. The blood pressure in the atria is increased.

This means ...

An artificial pacemaker would generate regular electrical impulses in the atria.

The regular electical impulses from the pacemaker are stronger than the irregular impulses from the SAN, t...

Atrial fibrillation (AF) is an abnormal condition of the heart.

In AF, irregular electrical impulses in the walls of the atria interrupt the normal regular impulses from the SAN.

The main art periods during the Romanticism era were: the Nazarene Movement ( 1820-1840 A.D.), the Ancients ( 1820-1840 A.D),the Purismo (1820-1860 A....

The Greek drama developed in the early 6th century B.C. from the ritual dances during the festivals of Dionysus (Greek name: Διόνυσος,Βάκχος). At first participants danced in groups, later they develop...