QRS complex

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The principal deflection in the electrocardiogram, representing ventricular depolarization.

QUIZZES

Did you ever collect all those state quarters? Put them to good use on this quiz about curious state monikers and the facts around them.

Question 1 of 8

Mississippi’s nickname comes from the magnificent trees that grow there. What is it?

It was a complex task they were asked to do, and every cultural and experiential advantage would be required.
Why Did We Panic After 9/11 and Ignore All We Knew About Responding to Security Threats?|Deborah Pearlstein|December 18, 2014|DAILY BEAST
However, their presence shows that Mars could have a more complex and evolving chemical story.
Methane on Mars: Life or Just Gas?|Matthew R. Francis|December 17, 2014|DAILY BEAST
KSM enters the complex through a “Sally Port,” a series of gates designed to allow just one vehicle in at a time.
9/11 Mastermind Is Afraid of the Ladies|Tim Mak|December 16, 2014|DAILY BEAST
We are a huge, complex, diverse country still offering freedom, opportunity and hope.
Dick Cheney vs. ‘Unbroken’|Mike Barnicle|December 15, 2014|DAILY BEAST

If Congress struggles to keep the lights on, how could it deal with issues as complex as police brutality?
Sharpton Recalls Civil Rights Struggle in DC March Against Police Violence|Ben Jacobs|December 13, 2014|DAILY BEAST
The act of the Covenanting Society is complex, and is the aggregate of the actings of all who compose it.
The Ordinance of Covenanting|John Cunningham
He knows when a sentiment is simple and when it is complex, when the heart is a dupe of the mind and when of the senses.
Repertory Of The Comedie Humaine, Complete, A -- Z|Anatole Cerfberr and Jules Franois Christophe
The solution of the problem, if complex in all clinical affections, is especially so in epilepsy.
A Statistical Inquiry Into the Nature and Treatment of Epilepsy|Alexander Hughes Bennett
Bud did not say anything; your efficient chauffeur reserves his eloquence for something more complex than a dead engine.
Cabin Fever|B. M. Bower
It is the most complex of all, as the lines contain internal rimes.
Chaucer's Works, Volume 1 (of 7) -- Romaunt of the Rose; Minor Poems|Geoffrey Chaucer