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..
Chickasaw, North American Indian tribe of Muskogean linguistic stock who originally inhabited what is now northern Mississippi and Alabama. In their earlier history the Chickasaw and the Choctaw (q.v.) may have been a single tribe.