An arrhythmic heartbeat.    From Wordnet, Princeton University. 

Reperfusion markers at primary PCI seen to predict short-term arrhythmic risk.    From Wordnik.com.  [theHeart.org] Reference

The LifeVest allows a patient's physician time to assess their long-term arrhythmic risk and make appropriate plans.    From Wordnik.com.  [The Earth Times Online Newspaper] Reference

The LifeVest allows a patient's physician time to assess his or her long-term arrhythmic risk and make appropriate plans.    From Wordnik.com.  [StreetInsider.com News Articles] Reference

She was dying like a dog, a poor, broken animal in the street, kicked and pummeled, the life escaping from her in short arrhythmic gasps.    From Wordnik.com.  [The Miko]

An arrhythmic wave suckerpunched him, broke over his chin.    From Wordnik.com.  [The Shell Collector : Stories] Reference

His speaking style is arrhythmic and somewhat halting, rather than flowing.    From Wordnik.com.  [Allan Abramson: The Change We Did Not Vote For] Reference

The car lurched a little, an arrhythmic side-to-side as we turned a corner.    From Wordnik.com.  [The Legacy] Reference

The ivory stick-ends moved to an enchanting, arrhythmic tempo as she marked on swiftly.    From Wordnik.com.  [Si'Wren of the Patriarchs] Reference

Upcoming mid-term elections and an arrhythmic economy make the story topical and relevant.    From Wordnik.com.  [James Scarborough: "Annie," Musical Theatre West] Reference

And the music sounded unbearably horrible, all squawks and squeals and arrhythmic pounding.    From Wordnik.com.  [Younger] Reference

It's a small stroke and an arrhythmic heartbeat at the same time, and if not treated, she could die.    From Wordnik.com.  [The 5th Horseman]

In the arrhythmic heartbeat-instant that follows, we all sigh and hope that this time he stays here for good.    From Wordnik.com.  [Asimov's Science Fiction]

Dancoyote Antonelli: At different times…atonal, arrhythmic audio, hyperformalism, related to Edgard Varese.    From Wordnik.com.  [DanCoyote Antonelli overcomes Real Life constraints in Second Life; finds a home and venue for his art] Reference

When you break that rhythm and come between it, you have arrhythmic events and it will destroy, it will not build.    From Wordnik.com.  [Mike Ragogna: From The Grateful Dead to Rhythm Devils: A Conversation with Mickey Hart] Reference

Just now the world is peaceful other than the incessant and arrhythmic liquid percussion, welcome calm, prepare for storm.    From Wordnik.com.  [Bugger (In Which I Feel Sorry For Myself)] Reference

'Now you mention it, sometimes I thought I could hear a discordant and arrhythmic murmur, as if a macaque was trying to play the piano.'.    From Wordnik.com.  [The Shadow of the Wind]

Doctors say he died of sudden arrhythmic death syndrome (SADS), a heart disorder which kills 12 young people a week. (via Doug Lussenhop).    From Wordnik.com.  [Boing Boing] Reference

Well my arrhythmic whiteboy friend, now you can have them, thanks to this brilliant, slickly glam, high-tech How to Dance Like an Axe.    From Wordnik.com.  [2007 May 07 « raincoaster] Reference

He probably did more than I did in terms of notworrying too much about tempo, to the point where eventually we didproduce arrhythmic pieces.    From Wordnik.com.  [Pink Floyd's Nick Mason on former bandmate Richard Wright (R.I.P.) | EW.com] Reference

Some other Per/Cry knock-out combinations also make everything arrhythmic.    From Wordnik.com.  [ScienceBlogs Channel : Life Science] Reference

Also used in medicines like influenza vaccines and anti-arrhythmic amiodarone.    From Wordnik.com.  [PhysOrg.com - latest science and technology news stories] Reference

When one places a quail in constant light of just over 5 lux, it becomes arrhythmic.    From Wordnik.com.  [ScienceBlogs Channel : Life Science] Reference

"But what if history is not cyclical and slow-moving but arrhythmic?" asks Ferguson.    From Wordnik.com.  [WHAT REALLY HAPPENED] Reference

(B) A summary of the percentages of flies exhibiting arrhythmic (red), complex rhythmic.    From Wordnik.com.  [PLoS Biology: New Articles] Reference

This mutation renders the clock arrhythmic and the SDS-PAGE analysis indicates that KaiC.    From Wordnik.com.  [PLoS ONE Alerts: New Articles] Reference

Mulberry, which was not amused, not amusing, and what the review of the show as "arrhythmic.".    From Wordnik.com.  [All Stories | The New York Observer] Reference

Patients were randomized to receive ablation therapy or commonly used anti-arrhythmic drug treatments.    From Wordnik.com.  [Media Newswire] Reference

If you then again put it in constant darkness it will again take a few days before it becomes arrhythmic.    From Wordnik.com.  [ScienceBlogs Channel : Life Science] Reference

At 86 degrees, your heart, its electrical impulses hampered by chilled nerve tissues, becomes arrhythmic.    From Wordnik.com.  [Born Again Redneck] Reference

Atrial fibrillation is the most common arrhythmic condition and carries the risk of sudden cardiac death.    From Wordnik.com.  [KCEN-DT] Reference

But when raised in isolation, the young sing a raspy, arrhythmic song that's different from the song heard in the wild.    From Wordnik.com.  [EurekAlert! - Breaking News] Reference

The sensitivity and relative risk for predicting arrhythmic death was highest at all time-points for the PD2i ™ algorithm.    From Wordnik.com.  [Blogpulse Top Links]

However, there were more arrhythmic events among the patients treated with dopamine than among those treated with norepinephrine.    From Wordnik.com.  [Medlogs - Recent stories] Reference

The most popular product offered by TSM is a set of ankle bands that allows the most arrhythmic person to dance any popular style.    From Wordnik.com.  [Coffee coffee and more coffee] Reference

(After a few distractingly arrhythmic tambourine taps during the first tune, Oh Blessed Thought's percussion proves categorically solid.).    From Wordnik.com.  [The Pitch | Complete Issue] Reference

At an average of 6 months follow-up, 35 of the 39 (90\%) patients were free of AF symptoms and no longer taking anti-arrhythmic medication.    From Wordnik.com.  [Health News from Medical News Today] Reference