Ventricular Tachycardia Essay

1055 words - 4 pages

Ventricular Tachycardia

An dysrhythmia of the heart is an irregular heartbeat rhythm. Ventricular tachycardia is an dysrhythmia in which the lower chambers of the heart, the ventricles, beat unusually fast.

The heart rate is measured with an electrocardiogram, or ECG. This is a machine that measures the electrical impulses from the patient's heart. This is displayed on a monitor or ECG graph paper. The boxes on the graph paper measure time. Five small boxes are equal to one large box. The large box represents two-tenths of a second.

The atrial contraction is represented by the P wave. This is an upward, or positive wave of the line on the graph. The ventricular contraction is displayed by the QRS complex. The QRS complex is composed of three waves, the Q, R, and S waves. The Q wave is the first downward, or negative movement on the graph. The R wave is the positive movement following the Q wave. It rises above the starting point of the Q wave. The S wave is a negative movement following the R wave. The S wave returns the line to the original baseline. The T wave, the repolarization of the ventricle, is a positive wave of the line that ends one beat of the heart. The atrial repolarization is not represented on the graph. It is absorbed by the QRS complex, which is a stronger impulse.

In a normal heart beat, there is one P wave for every QRS complex and T wave. The QRS complex is no larger than three small boxes on the graph paper. Every beat comes at the same interval as the other beats.

During ventricular tachycardia, the P wave is not represented. The QRS complex is wide. The T wave is not present on the graph. The intervals between beats can be up to five times shorter than a normal rhythm.

A normal heart beats anywhere from sixty to one hundred times per minute. The sinoatrial node or SA node, is an area of specialized tissue in the right atrium at the juncture of the superior vena cavae. The SA node is the primary pacemaker of the heart. It starts the heartbeat by spontaneously contracting, causing the rest of the heart to contract in a wave.

The wave spreads through the atria before reaching the atrioventricular node, or AV node, located just above the right ventricle. The AV node focuses the wave into the ventricles, contracting the ventricles. Should the SA node fail, the AV node can take over as the primary pacemaker at a rate of forty to sixty beats per minute.

Should both the SA node and the AV node fail, there is a tertiary pacemaker, the perkinje fibers. Perkinje fibers are located near the bottom of the ventricles and can stimulate contraction at a rate of twenty to forty beats per minute.

If the perkinje fibers or the AV node becomes irritated, they can begin contraction of the ventricles at speeds well above normal. Other causes of ventricular tachycardia include heart disease and medications.

When the ventricles are contracting at a rate greater than one...

Find Another Essay On Ventricular Tachycardia

Abnormalities in the cardiac cycle Essay

1763 words - 7 pages groups, ventricular arrythythmias and supraventricular arrythythmias. I.e., arrythythmias that occur in the ventricles and arrythythmias that occur above them. Subdivision is possible, with arrhythmias further divided into Disorders of impulse conduction and disorders of impulse generation.The various and detailed events that take place with every heart beat is referred to as the "cardiac cycle". The top chambers of the heart are called the atria and

Automated external defibrillator Essay

1109 words - 5 pages What I wanted to talk about today is this life save device called a automated external defibrillator. It has become the number one way to resuscitate a person who has had a cardiac arrest unwitnessed by emergency medical services and who is still in persistent ventricular fibrillation or ventricular tachycardia. Many people have played a big role in creating this device to become more efficient, smaller and easier to use for the general public

A brief description of cardiac myxomas and the anesthetic implications for anestesia providers. Some of the formatting of this paper has been lost....the superscripts for references lost their format

1973 words - 8 pages heart rate will allow for adequate left ventricular filling time. A heart rate of 70-90 is recommended. Tachycardia can decrease ventricular filling time as well. Drugs that increase heart rate, such as pavulon, should be avoided. Balestrieri22 recommends a narcotic given with a beta-blocker prior to induction with etomidate.2.prevent increases in systemic vascular resistance, maintain left ventricular afterload: afterload can be reduced with

Cardiovascular Disease and Aging

655 words - 3 pages right, left ventricular and atrial hypertrophy, cardiomegaly, and more. Systolic refers to a stage when the ventricles of the heart contract and pump blood throughout the body. There are usually no major alterations that occur with the systolic function of the heart. Diastolic refers to the relaxation period of the ventricles of the heart. When diastolic function becomes impaired and diastolic heart failure sets in there is an increase in

Case Study: Congestive Heart Failure

613 words - 2 pages Diagnosis: The patient seems to be suffering from Dilated Congestive Cardiomyopathy (DCM), or in simple terms, congestive heart failure; specifically ventricular failure.Justification for Diagnosis: The patient said he had been suffering of acute dyspnea which would be caused by the lungs filling with fluid since the heart isn't able to pump properly. Due to the patients hip replacement it is possible for him to have an infective agent even

Therapeutic Induced Hypothermia

1208 words - 5 pages . The patient has no history of coronary artery disease or any problems with his heart. Yet, he suffered an event of ventricular fibrillation which he was shocked for followed by a massive heart attack while unaccompanied at a restaurant. Upon arrival to the Southcoast Hospital he went into ventricular tachycardia in the Emergency Room and was shocked a second time. According to the Southcoast critical care manual, these events are part of the

Heart Rate: How can it Affect You?

1408 words - 6 pages :// Tachycardia: Fast Heart Rate (2012, May 30). In American Heart Association. Retrieved March 17, 2014, from Watanabe, MD, Junko, Maran Thamilarasan, MD, Eugene H. Blackstone, MD, James D. Thomas, MD, and Michael S. Lauer, MD. Heart Rate Recovery Immediately After Treadmill Exercise and Left Ventricular Systolic Dysfunction as Predictors of Mortality. N.p.: American Heart Association, n.d. Web. 14 Mar. 2014.

What´s Dilated Cardiomyopathy?

1441 words - 6 pages to prevent formation of emboli. “Asymptomatic, nonsustained ventricular tachycardia” is also seen in patients with dilated cardiomyopathy. Hines et al3 states that anti-dysrrhythmic medications does not increase chances of survivability but an ICD placement does decrease the “risk of sudden death in patients with heart failure who have survived a previous cardiac arrest.”3(138) Anesthetic Implications In the preoperative period, the patient with

Mild Therapeutic Hypothermia

1836 words - 7 pages the original research problem. This is directly attributed to the treatment with mild hypothermia as the study clearly states no statistically significant difference in complications and as a result should be considered in possibly all patients with similar conditions in practice due to lack of adverse effects (Holzer, 2002). The study could be strengthened by including other types of arrest or independent variables such as ventricular tachycardia

Prognosis for Infants and Children with Tetralogy of Fallow

1847 words - 8 pages infant may be acutely cyanotic at birth or may have cyanosis that gets progressively worse over the first year of life. One of the four defects that are specific to Tetralogy of Fallow is referred to as a Ventricular Septal Defect. According to the National Heart, Lung, and Blood Institute; this defect is characterized by a hole in the septum (Schumacher 2011). The ventricles are the main chambers in the heart that pump and the hole usually occurs

Heart Disease

1478 words - 6 pages .      Range of minor to serious congenital disorders are very evident at or shortly after birth. Ventricular Septal Defect is most common for heart malformation. An infant born with a defect has an opening between the lower chambers (ventricles) of its heart so there is an increased blood flow from the left side to the right side because the left side has more pressure than right side. The lungs at this

Similar Essays

Therapeutic Hypothermia Post Cardiac Arrest Essay

984 words - 4 pages ventricular tachycardia (VT) Current guidelines suggest that mild therapeutic hypothermia should also be considered in patients presenting with other rhythms although this has been less well studied. The aim of this research study is to review current literature reviews on therapeutic hypothermia post cardiac arrest ,its benefit for a neurological outcome, in shockable and non shockable rhythms, in and out of hospital cardiac arrest. while doing

Arrhythmogenic Right Ventricular Dysplasia (Arvd) Essay

960 words - 4 pages manifest as premature ventricular contractions[#2A.2] (extra or irregular heartbeats) or sustained ventricular tachycardia[#2A.2] (rapid heartbeats originating in the ventricle that may be brief or long-lasting and cause weakness, nausea, vomiting, light-headedness and the feeling of a racing/skipping heart) • Syncope[#2A.3] refers to a temporary loss of consciousness (fainting) • Heart failure[#2A.3] • Sudden cardiac arrest[#2A.3] Diagnosis and

Different Modes Of Treatment For Systolic Heart Failure

1356 words - 5 pages in patients who are too ill to undergo device implantation. 9.2- Implantable cardioverter defibrillators(Figure 1) Figure 1- Implantable cardioverter defibrillators Implantable cardioverter defibrillators were initially given to survivors of sudden cardiac death to treat recurrent episodes of ventricular tachycardia or ventricular fibrillation. People with left-ventricular dysfunction, either from ischaemic or non-ischaemic

Left Ventricular Outflow Diverticulum Associated Coarctation Of Aorta And Multiple Lentiginosis

1887 words - 8 pages , but most patients remain asymptomatic and without complications throughout their lifetime (14). Spontaneous rupture of a diverticulum has been found in some patients with sudden death. Cardiac rupture is occured more prevalent in the basal location, perhaps due to a predominance of fibrous lesions in this location (15) Tachycardia and ventricular fibrillation are other mechanisms that may contribute to sudden death in these patients. Although