Mechanical energy that drives circulation is?

January 20th, 2010 | Posted in atrial contractions   Comments Off
xoxonikka asked:


A) arterial pumping
B) atrial contraction
C) myocardial division
D) ventricular contraction
THE ANSWER, ACCORDING TO MY TEST RESULTS IS:

D) ventricular contraction

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premature ventricular contractions and marijuana/drinking?

January 20th, 2010 | Posted in atrial contractions   Comments Off
Connor G asked:


Alright guys,

I know this might be a dumb question, but I was having some heart palpitations and I went and saw the doctor. After a bunch of tests it turns out I have premature ventricular contractions. Now, I asked the doctor if I was alright to be smoking weed ( I had quit doing it over a year before I got palpitations but my friends always do it and always try to get me to also) and he said it was probably best if I dont. He said it might lead to something called atrial fibrillation. when I researched this is seemed serious but said it only really happened in old people. Do you think this is a serious worry or was the doctor just being extra careful?

Also, I normally only drink on Fridays (only beer very very rarely do I drink hard liquor) ill have 5-6 beers. Do you think this is something I need to watch too? I dont want to risk my life over any of it. The doctor said I shouldnt get carried away with drinking, so not to drink too much, but how much is too much (2 drinks,3 drinks,4) ??

I am just finding that I am loosing friends because I stop doing social things like this. It’s pretty dumb I know, but I am getting really depressed over it and I feel like I wont be able to have fun anymore. But if that’s the case then so be it.

Thanks,

Connor

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AV valves are open during atrial _______and ventricular______?

January 14th, 2010 | Posted in atrial contractions   Comments Off
JV asked:


I think it is contraction and filling……but not sure please help

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Arrhythmias Information

January 14th, 2010 | Posted in atrial contractions   Comments Off
Juliet Cohen asked:


An arrhythmia is any disorder of heart rate or heart rhythm, such as beating too fast (tachycardia), too slow (bradycardia), or irregularly. Arrhythmias are disorders of the regular rhythmic beating of the heart. They’re common about 2.2 million Americans are living with atrial fibrillation (one type of rhythm problem). Arrhythmias can occur in a healthy heart and be of minimal consequence. The heart contracts (beats) as the electrical impulse moves through it. This normally occurs 60 to 80 times a minute when a person is at rest. The atria contract a split-second before the ventricles. This lets the atria empty their blood into the ventricles before the ventricles contract. They also may indicate a serious problem and lead to heart disease, stroke or sudden cardiac death.

The Arrhythmias may also be caused by some substances or drugs, including beta blockers, psychotropics, sympathomimetics, caffeine, amphetamines, and cocaine. In the United States more than 850,000 people are hospitalized for an arrhythmia each year. Some of the types of arrhythmias is atrial fibrillation. This type of arrhythmia requires treatment and can increase your risk of stroke. Paroxysmal atrial tachycardia is types of arrhythmias. This type of arrhythmia may be unpleasant but is usually not dangerous. Other types of ectopic beats and ventricular tachycardia and ventricular fibrillation. Supraventricular arrhythmias may be treated with anti-arrhythmic drugs. Most supraventricular arrhythmias can be treated and cured with radiofrequency ablation, eliminating the need for lifelong drug therapy.

Taking some prevent coronary artery disease may reduce chance of developing an arrhythmia. Some steps include not smoking; eating a well-balanced, low-fat diet; and exercising regularly. Anticoagulant or antiplatelet therapy reduce the risk of blood clots and include warfarin (a “blood thinner”) or aspirin. Antiarrhythmic drugs control heart-rate. A pacemaker is an implantable device that helps regulate slow heartbeats (bradycardia). A small battery-driven device is placed under the skin near the collarbone in a minor surgical procedure. Vagal maneuvers able to stop a supraventricular tachycardia (SVT) by using particular maneuvers. Cardiac defibrillation can be used to stop an abnormal rhythm and restore a normal one. Surgery is also correctly treatment of arrhythmias.

Arrhythmias Treatment and Prevention Tips

1. Avoid smoking.

2. Eating a well-balanced.

3. Low-fat diet.

4. Do exercising regularly such as walking, jogging and runing.

5. Antiarrhythmic drug control heart-rate, and include beta-blockers.

6. Anticoagulant or antiplatelet therapy reduce the risk of blood clots and include warfarin.



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Atrial Fibrillation in India: Information, Symptoms, Treatment

January 14th, 2010 | Posted in atrial contractions   Comments Off
Sam Jones asked:


India is becoming hub for Atrial Fibrillation treatment because of the availability of most advanced surgical techniques for the treatment. In India you will find many destinations where you can avail benefits of Medical Tourism, with Kerala, Goa and Delhi being the pioneer in the field. Medical Tourism is rather a new concept which has gained immense popularity owing to its benefits and advantages. Your quest for a destination, where you can have a medical tour besides enjoying sightseeing, culminates here. The Country offers affordable and best medical treatments to medical tourists. These treatments are offered by highly specialized hospitals in India. Atrial Fibrillation is one of the famous medical treatments in India.

Atrial fibrillation is a disorder found in about 2.2 million Indians. During atrial fibrillation, the heart’s two small upper chambers (the atria) quiver instead of beating effectively. Blood isn’t pumped completely out of them, so it may pool and clot. If a piece of a blood clot in the atria leaves the heart and becomes lodged in an artery in the brain, a stroke results. About 15 percent of strokes occur in people with atrial fibrillation.

The likelihood of developing atrial fibrillation increases with age. Three to five percent of people over 65 have atrial fibrillation. Normal heart contractions begin as an electrical impulse in the right atrium. This impulse comes from an area of the atrium called the sinoatrial (SA) or sinus node, the “natural pacemaker“. AF occurs when rapid, disorganized electrical signals cause the atria (AY-tree-uh), the two upper chambers of the heart, to fibrillate. The term “fibrillate” means to contract very fast and irregularly. In Atrial Fibrillation, blood pools in the atria and isn’t pumped completely into the ventricles (VEN-trih-kuls), the heart’s two lower chambers. As a result, the heart’s upper and lower chambers don’t work together as they should.

AF may occur rarely or every now and then, or it may become a persistent or permanent heart rhythm lasting for years.

Classifications of Atrial Fibrillation in India:

First detected  — Only one diagnosed episode Paroxysmal  — recurrent episodes that self-terminate in less then 7 days. Persistent  — recurrent episodes that last more then 7 days. Permanent  — an ongoing long-term episode.

All atrial fibrillation patients are initially in the category called first detected AF in India. These patients may or may not have had previous undetected episodes. If a first detected episode self-terminates in less than 7 days and then another episode begins later on, the case has moved into the category of paroxysmal AF. Although patients in this category have episodes lasting up to 7 days, in most cases of paroxysmal AF the episodes will self-terminate in less than 24 hours. If instead the episode lasts for more than 7 days, it is unlikely to self-terminate and it is called persistent AF. In this case, the episode may be terminated by cardio version. If cardio version is unsuccessful or it is not attempted, and the episode is ongoing for a long time (e.g. a year or more), the patient’s AF is called permanent.

Signs and Symptoms:

Atrial fibrillation is usually accompanied by symptoms related to a rapid heart rate in India. Rapid and irregular heart rates may be perceived as palpitation, exercise intolerance, and occasionally produce angina (if the rate is faster and puts the heart under strain) and congestive symptoms of shortness of breath or edema. Sometimes the arrhythmia will be identified only with the onset of a stroke or a transient ischemic attack(TIA). It is not uncommon for a patient to first become aware of AF from a routine physical examination or ECG, as it may be asymptomatic in many cases.

As most cases of atrial fibrillation are secondary to other medical problem, the presence of chest pain or angina, symptoms of hyperthyroidism such as weight loss and diarrhea, and symptoms suggestive of lung disease would indicate an these cause in India.

What causes atrial fibrillation?

Atrial fibrillation is associated with many conditions in India, including:

High blood pressure Heart valve disease Having undergone heart surgery shortness of breath Heart palpitation

Treatment of Artial Fibrillation in India:

The treatment for atrial fibrillation depends on how severe your symptoms are. It also depends on whether you have heart disease or have recently had a stroke. To prevent the possibility of clotting and stroke, doctors often prescribe the drug warfarin to thin the blood in AF patients determined to have a high risk of stroke. Individuals on warfarin therapy must be monitored with periodic blood tests to make sure their blood is thin enough to prevent clots, but not so thin as to promote bleeding. Long-term treatment varies depending on the cause of the atrial fibrillation or flutter. Medication may include beta-blockers, calcium channel blockers, digitalis or other medications (such as anti-arrhythmic drugs), which slow the heartbeat or the conduction of the impulse from the atria to the ventricles.

Radiofrequency ablation may be effective in some patients when medications don’t work. In this procedure, thin and flexible tubes are introduced through a blood vessel and directed to the heart muscle. Then a burst of radiofrequency energy is delivered to destroy tissue that triggers abnormal electrical signals or to block abnormal electrical pathways.

There are three classes of heart-function drugs that can be used alone, or in combination to reduce the heart rate. They are digitalis drugs, beta blockers drugs and calcium channel blocker drugs.

Prevention Tips suggested by doctors in India for Atrial Fibrillation:

Eat heart-healthy foods. Increase your physical activities. Quit smoking and avoid alcohol. Defibrillation increases the risk of stroke. Atrial pacemaker can be implanted under the skin to regulate the heart rhythm.

These days it seems like every country in the world promotes itself as a haven for medical tourism. The reality is that in most cases they offer sub-standard facilities and limited skills/qualifications. India has tens of thousands of skilled physicians and nurse practitioners for Atrial fibrillation treatment. Over the last two decades, the economic boom in India has led to the building of medical facilities & infrastructure that rival the very best that western medical care that the west has to offer. Many of the physicians that practice in these hospitals and clinics have returned (to India) from the U.S. and Europe, leaving behind successful practices. While some small countries may be viable as alternatives for minor surgical procedures, India is the only mainstream option that offers a comprehensive solution for any and all medical needs, and does this with the highest levels of service, facilities, and professional skills.



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Help Reading Holter Monitor Results?

January 9th, 2010 | Posted in atrial contractions   Comments Off
KkSunshine asked:


I am a 25 year old female and over the last few months my bp and pulse have been low. My normal BP was around 120/78 and resting pulse was always around the 70’s. Lately my bp has been 92/49with a pulse of 50. The Dr. sent me for a ECHO and Holter monitor. I’m not overweight or very active. Had back surgery a year ago and still inactive for now. Any help would be appreciated.

Minimal heart rate is 36 beats per minute, consistent with sinus bradycardia. Average heart rate is 57 beats per minute. Maximun heart rate was 135 beats per minute, consistent with sinus tachycardia. Nine percent of the time, the patient was tachycardia; 61% of the time the patient was bradycardic with a heart rate of less than 60 beats per minute. 1.76 seconds was the longest R-R interval, indicating no significant pauses. There were no ventricular ectopy noted. There was 17 isolated premature atrial contractions noted, no ventricular tachycardia or supraventricular tachycardia noted. Thank you for replies.

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Heart Diseases and Disorders

January 8th, 2010 | Posted in atrial contractions   Comments Off
mocowiz asked:


Millions of people experience irregular heartbeats at some point in their lives. Most of these episodes, called arrhythmias, are harmless and happen in healthy people free of heart disease. Sometimes, however, rhythm disturbances can be serious or even fatal. Other heart diseases

can be dangerous in their own right and can increase the likelihood of arrhythmias.

Electrical

Arrhythmias that originate in the heart’s upper chambers, the atria Atrial Fibrillation (AF or A Fib) More than 2 million people in the United States have atrial fibrillation, making it a very common heart rhythm disorder. In A Fib, the heartbeat is irregular and rapid, sometimes beating as often as 300 times a minute, about four times faster than normal. Although it isn’t life threatening, A Fib can lead to other rhythm problems, chronic fatigue and congestive heart failure. Chances of having a stroke are five times higher for those with A Fib.

Atrial Flutter (AFL)

Atrial flutter is similar to A Fib because it too is characterized by a rapid heartbeat. Instead of many disorganized signals, however, AFL is caused by a single electrical wave that circulates very rapidly in the atrium, about 300 times a minute, leading to a very fast, steady heartbeat.

Sick Sinus Syndrome (SSS)

SSS is not a specific disease, but a group of signs or symptoms that indicate the heart’s natural electrical pacemaker, the sinoatrial node, is not functioning properly. In SSS, the heart rate can switch back and forth between a slow rate (bradycardia) and a fast rate (tachycardia). A permanent pacemaker, sometimes in combination with medication, is the primary treatment.

Sinus Tachycardia

A harmless rhythm, sinus tachycardia is a normal increase in heart rate that happens with fever, excitement and exercise. It does not require treatment problem, such as anemia or hyperthyroidism, should be treated.

Arrhythmias that originate in the heart’s lower chambers, the ventricles

Ventricular Tachycardia (VT)

Characterized by a very fast heart rate, VT usually is seen in the setting of other serious heart disease. Occasionally, it occurs in people with normal hearts. It usually requires prompt treatment, sometimes with medication. Sometimes it is treated with radiofrequency ablation or surgery. Often people with VT are protected by implantation of a defibrillator. Because VT can lead to ventricular fibrillation (next item) it is considered a serious condition that warrants aggressive monitoring and treatment.

Ventricular Fibrillation (VF)

Sudden cardiac death, caused by ventricular fibrillation, poses the greatest threat and accounts for half of all cardiac deaths. In VF, the heartbeat is rapid and chaotic, which causes the lower heart chambers, or ventricles, to go into a spasm. Sometimes, however, a heart attack can lead to VF. VF is abrupt and happens without any warning and it halts all heart functioning. The lack of oxygen throughout the body, and especially to the brain, is deadly. Also known as cardiac arrest, sudden cardiac death is due to an electrical circuitry problem. It is not a the same as a heart attack, or myocardial infarction, which is a circulatory problem caused by clogged blood vessels that cut off the supply of blood to the heart.

Although CPR can provide some benefit, the only truly effective VF treatment is defibrillation, which relies on paddles or electrodes to “shock” the heart back to normal rhythm. Without treatment, loss of consciousness comes in seconds, and death is inevitable.

Other

Premature Contractions

Extra, early or “skipped” beats are the most frequent cause of irregular heart rhythms. These can start in the upper or lower chambers of the heart.

Long QT Syndrome (LQTS)

Long QT Syndrome is a disorder of the electrical system. It can be inherited, acquired after taking certain medications, or caused by a combination of heredity and medications. People with LQTS are susceptible to ventricular fibrillation.

Heart Block

When electrical impulses generated in the upper chambers of the heart are not properly transmitted to the lower chambers, Heart Block happens. The heart then beats too slowly, reducing the oxygen that gets to the body and brain.

Syncope (Fainting)

Fainting, or feeling as if one might faint, can be caused by serious heart rhythm disorders and needs to be evaluated carefully. Sometimes the cause is not heart related, for instance when low blood sugar is to blame, but still can be dangerous. No matter what the cause, fainting can be

dangerous simply because of the potential for injuries from falling.

Article By http://heart-improve.blogspot.com



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Help reading Holter Monitor Results?

January 8th, 2010 | Posted in atrial contractions   Comments Off
KkSunshine asked:


I am a 25 year old female and over the last few months my bp and pulse have been low. My normal BP was around 120/78 and resting pulse was always around the 70’s. Lately my bp has been 92/49with a pulse of 50. The Dr. sent me for a ECHO and Holter monitor. I’m not overweight or very active. Had back surgery a year ago and still inactive for now. Any help would be appreciated.

Minimal heart rate is 36 beats per minute, consistent with sinus bradycardia. Average heart rate is 57 beats per minute. Maximun heart rate was 135 beats per minute, consistent with sinus tachycardia. Nine percent of the time, the patient was tachycardia; 61% of the time the patient was bradycardic with a heart rate of less than 60 beats per minute. 1.76 seconds was the longest R-R interval, indicating no significant pauses. There were no ventricular ectopy noted. There was 17 isolated premature atrial contractions noted, no ventricular tachycardia or supraventricular tachycardia noted. Thank you for replies.

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On an ECG, why does the ventricular contraction show up as a 3-part signal (QRS complex)?

January 3rd, 2010 | Posted in atrial contractions   Comments Off
Greg R asked:


The atrial contraction produces a simple signal (the P-wave).
What does each part of the QRS represent ?

I am an Anatomy & Physiology instructor.

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Do the atria Contract?

December 27th, 2009 | Posted in atrial contractions   Comments Off
Cooler asked:


If so, show me a detail medical reason for this phenonmenon. Why doesn’t the Atria have a valve to prevent back flow if the atria do contract. Where does the blood go? What is the mechanism of atrial contraction ?> Please give a most detailed as answer as possible. I need to proove this to a fellow classmate who refuses to believe the atria contract, he says its not possible because if the atria contract blood will flow back as there is no valve that sepeates the atra from the vena cavas.

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