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Topic: Premature ventricular contraction

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	Premature Ventricular Contractions Glossary of Terms with Definitions on MedicineNet.com
		Ventricular: Pertaining to the ventricles, the lower chambers of the heart, as in ventricular fibrillation and ventricular septal defect.
		Ventricular fibrillation is most commonly associated with heart attacks or scarring of the heart muscle from previous heart attack.
		Ventricular tachycardia: An abnormally rapid heart rhythm that originates from a ventricle, one of the lower chambers of the heart.
	www.medicinenet.com /premature_ventricular_contractions/glossary.htm (4656 words)

	Premature ventricular contraction - Wikipedia, the free encyclopedia
		Premature ventricular contraction (PVC), also known as ventricular premature beat (VPB) or extrasystole, is a form of irregular heartbeat in which the ventricle contracts prematurely.
		PVCs in young children are thought to be associated with developmental factors of the autonomic nervous system.
		PVCs may be unifocal (coming from the same part of the heart and having the same shape on the ECG) or multifocal (coming from several parts of the heart and having various shapes on the ECG).
	en.wikipedia.org /wiki/Premature_ventricular_contraction (496 words)

	Ventricular Ectopic Beats: Encyclopedia of Medicine
		A ventricular ectopic beat (VEB) is an extra heartbeat originating in the lower chamber of the heart.
		Ventricular ectopic beats are common and do not indicate a problem in people without heart disease.
		Ventricular ectopic beats are easily seen on an electrocardiogram.
	health.enotes.com /medicine-encyclopedia/ventricular-ectopic-beats (528 words)

	eMedicine - Premature Ventricular Contraction : Article Excerpt by: Sarah Stahmer, MD (Site not responding. Last check: 2007-11-03)
		PVCs are characterized by premature and bizarrely shaped QRS complexes usually wider than 120 msec on with the width of the ECG.
		During ventricular activation, the area of slow conduction activates the blocked part of the system after the rest of the ventricle has recovered, resulting in an extra beat.
		PVCs in older patients, in particular those with underlying heart disease, are associated with an increased risk of adverse cardiac events, particularly sustained ventricular dysrhythmias and sudden death.
	www.emedicine.com /emerg/byname/premature-ventricular-contraction.htm (743 words)

	HerbChina2000.com - Herbal Remedies - Premature beat
		Premature beats (contractions) are beats that occur earlier than expected and briefly interrupt the normal heart rhythm.
		Premature beats often cause a sensation of a "skipped beat" or "flip-flop." What are really felt are not the premature beats themselves but rather the forceful beat that follows the pause after the premature beat.
		If premature ventricular beats are frequent or occur in certain patterns, they may be indicative of more serious problems.
	www.herbchina2000.com /therapies/APB.shtml (862 words)

	Ventricular Remodeling. Click here now! Ventricular Remodeling! (Site not responding. Last check: 2007-11-03)
		If premature ventricular contraction pvcs medical treatment is successful then surgical closure can be delayed for a while to allow time for spontaneous closure or at least a significant reduction in size..
		Since relative wall thickness and left ventricular mass indexation derived from echocardiographic measurements are necessary in determining left ventricular geometric pattern, echocardiographic evaluation of the newly diagnosed hypertensive should be an essential step in their initial workup.
		A premature ventricular complex is characterized by the premature occurrence of a QRS complex that is bizarre in shape and lasts longer than 120 msec.
	poolhullo.501megs.com /ventricular/remodeling.html (4409 words)

	Premature Ventricular Contraction
		The co-ordination of contractions in all of these chambers, which occurs with every beat of the pulse, is carried out by a network of specialised muscle fibres within the heart, which you can liken to a mesh of electrical wiring.
		Premature ventricular contractions, or PVCs, are one of many ways in which this natural rhythm can be disturbed and they occur when cells within the ‘wiring’ of the ventricles trigger off too soon, sending an abnormally early signal around the ventricles which causes them to contract.
		PVCs get more frequent with age and if there are other heart problems present, such as if there is hardening of the heart's arteries but they can be sufficiently frequent even in healthy people to cause symptoms such as skipped beats - although these are not usually harmful as such.
	www.netdoctor.co.uk /ate/heartandblood/201172.html (552 words)

	Premature Summary
		Prematurity is much more common in multiple pregnancy and for mothers who have a history of miscarriages or who have given birth to a premature infant in the past.
		Some of the common problems among premature infants are jaundice (yellow discoloration of the skin and whites of the eyes), apnea (a long pause in breathing), and inability to breast or bottle feed.
		Premature infants are also more susceptible to infections because they are born with fewer antibodies.
	www.bookrags.com /Premature (1603 words)

	YSM CaseBook: Edie Earl
		Premature ventricular contractions (PVCs) have been studied intensively in the medical literature.
		PVCs occur in approximately 1 per cent of normal individuals as determined by standard EKG and in many as 75% as determined by Holter monitor.
		With advancing age, PVCs increase in prevalence and may be associated with a higher risk for underlying heart disease, myocardial infarction, and sudden death.
	info.med.yale.edu /casebook/cardio/earl/discussion.html (561 words)

	Categories of Arrhythmias - Texas Heart Institute Heart Information Center
		Ventricular arrhythmias occur in the lower chambers of the heart, called the ventricles.
		Ventricular tachycardia is a condition in which the SA node no longer controls the beating of the ventricles.
		PVCs (sometimes called PVB for premature ventricular beat) generally are not a cause for alarm and often do not need treatment.
	www.texasheartinstitute.org /HIC/Topics/Cond/arrhycat.cfm (1186 words)

	Paroxysmal Ventricular Tachycardia (Site not responding. Last check: 2007-11-03)
		Ventricular compliance is determined by the physical properties of the tissues making up the ventricular wall and by the state of ventricular relaxation.
		The membranous septum is divided paroxysmal ventricular tachycardia by the septal leaflet of the tricuspid valve.
		Left ventricular hypertrophy is a major complication of hypertension with depero bugrider risk of sudden death and arrhythmias among others..
	poolhullo.501megs.com /renewing-piero.html (2862 words)

	Premature Ventricular Contraction Information by MedicineNet.com
		Premature ventricular contractions (PVCs) are premature heartbeats originating from the ventricles of the heart.
		During a premature ventricular contraction, the ventricle electrically discharges (and contracts) prematurely before the normal electrical discharges arrive from the SA node.
		These premature discharges are due to electrical “irritability” of the heart muscle of the ventricles, and can be caused by heart attacks, electrolyte imbalances, lack of oxygen, or medications.
	www.medicinenet.com /premature_ventricular_contractions/article.htm (509 words)

	Medical Dictionary: Premature ventricular contraction - WrongDiagnosis.com
		Premature ventricular contraction: Premature contractions of the ventricle, the most common of all arrhythmias.
		Premature ventricular contraction : premature ventricular beats, the most common of all arrhythmias; in the absence of heart disease, they are not of great clinical significance, but in patients with coronary disease, they represent a constant danger of ventricular tachycardia or fibrillation and sudden death.
		Premature ventricular contraction: "Extra" heartbeats, also called palpitations, or premature ventricular contractions (PVCs) happen when there is irritation in the lower part of the heart’s pumping chambers.
	www.wrongdiagnosis.com /medical/premature_ventricular_contraction.htm (430 words)

	Premature Ventricular Contractions (Site not responding. Last check: 2007-11-03)
		Since the depolarization begins in the ventricular muscle, and does not have the advantage of spreading through the high speed His-Purkinje system, the resulting QRS complex is broad and irregularly shaped, and the ventricular contraction is weaker and less coordinated.
		Since the ventricular depolarization is less coordinated, less internal cancellation of the wavefront vectors occurs, and the resulting QRS amplitude is increased.
		The PVC interrupts the normal rhythm of the heart, and the next scheduled beat often fails to occur because the ventricle is still in a refractory state.
	www.campionambulance.com /staff/premature_ventricular_contractio.htm (327 words)

	Premature ventricular contraction (Site not responding. Last check: 2007-11-03)
		Precautions may premature ventricular contraction cause for their vsd is present, the information in these channels.
		premature ventricular contraction areas that they increase risk of the vt. A pediatric doseattenuating system should be examined regularly by premature ventricular contraction decreasing potassium channel blockade.
		Premature ventricular contraction vt associated with left ventricular septal defect is closed with a rough estimate.
	ventricular.bagopps.net /premature-ventricular-contraction.html (1038 words)

	Arrhythmias Originating in the Ventricles
		Premature beats are very common in normal children and teenagers — most people have them at some time.
		Ventricular tachycardia (VT) is a fast heart rate that starts in the heart's lower chambers (ventricles).
		Ventricular fibrillation is a condition in which disordered electrical activity causes the ventricles to contract in a rapid, unsynchronized, uncoordinated fashion.
	www.americanheart.org /presenter.jhtml?identifier=11 (361 words)

	Texas Arrhythmia Institute - Premature Beats - www.txai.org (Site not responding. Last check: 2007-11-03)
		The most common form of premature beat seen in daily practice is a premature contraction originating in the ventricle (PVC =premature ventricular contraction).
		An increased rate of premature contractions has been observed prior to the onset of atrial fibrillation and has been associated with lung and thyroid diseases.
		Premature Ventricular Contractions (PVC) are the most common of the ventricular arrhythmias.
	www.txai.org /edu/irregular/premature_beats.htm (480 words)

	UpToDate Patient information: Premature ventricular contractions (PVC) (Site not responding. Last check: 2007-11-03)
		Premature ventricular contractions (PVCs) occur when there is a short circuit of the electrical system in an area of the ventricles, or there is an ectopic focus in the ventricle that sends out its own electrical impulse.
		The PVC is different from a normal sinus beat because the areas of heart muscle are stimulated in an abnormal order; the ventricles are stimulated first.
		In addition to being premature, the PVC often interferes with the heart's usual response to the next, normal impulse that comes from the sinus node.
	patients.uptodate.com /topic.asp?file=hrt_dis/11733 (2024 words)

	Premature ejaculation-Premature baby-Premature ejaculation cure-Premature ventricular contraction (Site not responding. Last check: 2007-11-03)
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	www.freehostsltd.com /sites/allaboutweb/premature-ejaculation-921.html (383 words)

	eMedicine - Premature Ventricular Contraction : Article by Sarah Stahmer, MD (Site not responding. Last check: 2007-11-03)
		Age: PVC frequency increases with age, reflecting the increased prevalence of hypertension and cardiac disease in aging populations.
		Patients with PVCs that are noninducible (ie, unable to trigger ventricular tachycardia during stimulation) have a low risk of sudden death.
		PVCs in healthy newborns generally resolve by the 12th week and usually require no treatment once the presence of a healthy heart is confirmed.
	www.emedicine.com /emerg/topic773.htm (4677 words)

	Cardiac arrhythmia - Wikipedia, the free encyclopedia
		Cardiac arrhythmia is a group of conditions in which the muscle contraction of the heart is irregular or is faster or slower than normal.
		Ventricular fibrillation occurs in the ventricles (lower chambers) of the heart; it is always a medical emergency.
		Defibrillation differs in that it is used for ventricular fibrillation and pulseless ventricular tachycardia, and more electricity is delivered with defibrillation than with cardioversion.
	en.wikipedia.org /wiki/Arrhythmia (1568 words)

	Quiz: Arrhythmias
		The episodes are usually attributed to "re-entry" of the action potential back into the AV node, causing ventricular action potentials to rapidly follow one another.
		This is due to a damaged portion of the ventricle and is a serious matter because it is prone to lapse into ventricular fibrillation.
		Observe that a premature contraction occurring in the atria resets the SA node, which does not occur with a premature ventricular contraction.
	courses.washington.edu /conj/ecg/ecg.htm (445 words)

	Ventricular Premature Beats: Abnormal Heart Rhythms: Merck Manual Home Edition
		A ventricular premature beat (ventricular ectopic beat, premature ventricular contraction) is an extra heartbeat resulting from abnormal electrical activation originating in the ventricles before a normal heartbeat would occur.
		Isolated ventricular premature beats have little effect on the pumping action of the heart and usually do not cause symptoms, unless they are extremely frequent.
		Ventricular premature beats are not dangerous for people who do not have heart disease.
	www.merck.com /mmhe/sec03/ch027/ch027f.html (435 words)

	PVC's and hormone flucuations (Site not responding. Last check: 2007-11-03)
		They did see several pvc's and pac's but said the structure of my heart was perfect and I had nothing to worry about.
		I ended up with ablations because I was having tons of pvc (over 20,000 in 24 hour recordings) and they were causing cardiomyopathy.
		And then....there are the hormones....they could trigger some pretty crazy pvc days for me...It will be interesting to see if the atenolol helps keep the pvcs at bay before and during your period....
	www.medhelp.org /forums/cardio/messages/34785.html (3489 words)

	Ectopic Heartbeat - Health Centers (Site not responding. Last check: 2007-11-03)
		Ectopic heartbeat is an irregularity of the heart rate and heart rhythm involving extra or skipped heartbeats.
		Ectopic beats are rare in children other than those with congenital heart disease.
		In adults, ectopic beats can occur more commonly, and underlying reversible reasons should be investigated even if it turns out that no treatment is ultimately needed.
	www.wpxi.com /encyclopedia/6861509/detail.html (540 words)

	Premature Ventricular Contractions - Page 1
		Premature ventricular contractions (sometimes called PVCs or VPCs or benign ventricular ectopics) are a fairly common abnormal heart rhythm (
		If these cells fire at the wrong time, the electrical impulse they generate will cause the ventricles to contract early, resulting in a premature ventricular contraction.
		In general, these abnormal beats are harmless, although there are certain patients in whom PVCs may cause more serious problems.
	heart.healthcentersonline.com /arrhythmia/pvc.cfm (415 words)

	premature ventricular contraction
		A premature ventricular contraction point for communities and health-care systems premature ventricular contraction to assess current tobacco-use prevention and cessation activities.
		Adult premature ventricular contraction calculates annual smoking-attributable deaths, years of potential life lost, smoking-attributable premature ventricular contraction and productivity premature ventricular contraction for adults premature ventricular contraction the United States, individual states, and user-defined populations.
		Maternal and Child Health (MCH) SAMMEC estimates the number of annual smoking-attributable deaths and years of premature ventricular contraction life lost for infants in the United States and individual states, and neonatal medical expenditures for certain user-defined populations.
	ventrical-cancer.rojik.info /premature-ventricular-contraction.html (330 words)

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