ECG can be analyzed by studying components of the waveform. These waveform components indicate cardiac electrical activity. The first upward of the ECG tracing is the P wave. It indicates atrial contraction. The QRS complex begins with Q, a small downward deflection, followed by a larger upwards deflection, a peak (R); and then a downwards S wave. This QRS complex indicates ventricular depolarization and contraction.
chica (plural chicas) (Canada, US, informal) A Latin-American girl; a Latina. 2005, Magnolia Belle, Black Wolf: Lakota Man But, I thought you wanted to come with us. There are some hot chicas just waiting for the Black Wolf boys..
boa. n. 1. (Animals) any large nonvenomous snake of the family Boidae, most of which occur in Central and South America and the Caribbean.. 1. Any of various large, nonvenomous, chiefly tropical snakes of the family Boidae, which includes the anacondas, the boa constrictor, and other snakes that coil around and asphyxiate their prey.