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..
Word forms: plural boas. 1. countable noun. A boa or a feather boa is a long soft scarf made of feathers or of short pieces of very light fabric. She wore a large pink boa around her neck. 2. countable noun. A boa is the same as a boa constrictor.