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Home » Cardiac Arrest

Cardiac Arrest

by Ade
April 5, 2009
in Uncategorized

What is cardiac arrest?
Cardiac arrest is the sudden, abrupt loss of heart function. The victim may or may not have diagnosed heart disease. It’s also called sudden cardiac arrest or unexpected cardiac arrest. Sudden death (also called sudden cardiac death) occurs within minutes after symptoms appear.

What causes cardiac arrest?
The most common underlying reason for patients to die suddenly from cardiac arrest is coronary heart disease. Most cardiac arrests that lead to sudden death occur when the electrical impulses in the diseased heart become rapid (ventricular tachycardia) or chaotic (ventricular fibrillation) or both. This irregular heart rhythm (arrhythmia) causes the heart to suddenly stop beating. Some cardiac arrests are due to extreme slowing of the heart. This is called bradycardia.
Other factors besides heart disease and heart attack can cause cardiac arrest. They include respiratory arrest, electrocution, drowning, choking and trauma. Cardiac arrest can also occur without any known cause.

Can cardiac arrest be reversed?
Brain death and permanent death start to occur in just 4 to 6 minutes after someone experiences cardiac arrest. Cardiac arrest can be reversed if it’s treated within a few minutes with an electric shock to the heart to restore a normal heartbeat. This process is called defibrillation. A victim’s chances of survival are reduced by 7 to 10 percent with every minute that passes without CPR and defibrillation. Few attempts at resuscitation succeed after 10 minutes.

How many people survive cardiac arrest?
No statistics are available for the exact number of cardiac arrests that occur each year. It’s estimated that more than 95 percent of cardiac arrest victims die before reaching the hospital. In cities where defibrillation is provided within 5 to 7 minutes, the survival rate from sudden cardiac arrest is as high as 30–45 percent.

What can be done to increase the survival rate?
Early CPR and rapid defibrillation combined with early advanced care can result in high long-term survival rates for witnessed cardiac arrest. For instance, in June 1999, automated external defibrillators (AEDs) were mounted 1 minute apart in plain view. In the first 10 months, 14 cardiac arrests occurred, with 12 of the 14 victims in ventricular fibrillation. Nine of the 14 victims (64 percent) were revived with an AED and had no brain damage.
If bystander CPR was initiated more consistently, if AEDs were more widely available, and if every community could achieve a 20 percent cardiac arrest survival rate, an estimated 40,000 more lives could be saved each year. Death from sudden cardiac arrest is not inevitable. If more people react quickly by calling 9-1-1 and performing CPR, more lives can be saved.

Prevention With positive outcomes  following cardiac arrest so unlikely, a great deal of effort has been spent in finding effective strategies to prevent cardiac arrest.
As noted above, one of the prime causes of cardiac arrest outside of hospital is ischemic heart disease. Vast resources have been put into trying to reduce cardiovascular risks across much of the developed world. In particular schemes have been put in place to promote a healthy diet and exercise. For people considered to be particularly at risk of heart disease, measures such as blood pressure control, prescription of cholesterol lowering medications, and other medico-therapeutic interventions, have been widely used. A magnesium deficiency, or lower levels of magnesium, can contribute to heart disease and a healthy diet that contains adequte magnesium may help prevent heart disease.[23] Magnesium can be used to enhance long term treatment, so it may be effective in long term prevention.
Patients in hospital are far less likely to have a cardiac arrest caused of primary cardiac origin, and hence present in asystole or PEA, and have bleak outcomes.[citation needed] Extensive research has shown that patients in general wards often deteriorate for several hours or even days before a cardiac arrest occurs[11][24]. This has been attributed to a lack of knowledge and skill amongst ward based staff, in particular a failure to carry out measurement of the respiratory rate, which is often the major predictor of a deterioration[11] and can often change up to 48 hours prior to a cardiac arrest. In response to this, many hospitals now have increased training for ward based staff. A number of “early warning” systems also exist which aim to quantify the risk which patients are at of deterioration based on their vital signs and thus provide a guide to staff. In addition, specialist staff are being utilised more effectively in order to augment the work already being done at ward level. These include:
· Crash teams (also known as code teams) – These are designated staff members who have particular expertise in resuscitation, who are called to the scene of all arrests within the hospital.
· Medical emergency teams – These teams respond to all emergencies, with the aim of treating the patient in the acute phase of their illness in order to prevent a cardiac arrest.

Tameka Raymond was having liposuction and had complications
The wife of R&B singer Usher continues to recover in a Sao Paulo hospital after suffering a cardiac arrest shortly before undergoing plastic surgery, the spokeswoman of the doctor who was to perform the procedure said.
Ellen Dastry, spokeswoman for plastic surgeon Silvio Sterman, says Tameka Raymond checked into the Sao Rafael Hospital  for a “simple liposuction.” Dastry said that Raymond suffered a cardiac arrest while being anesthetized for the procedure “but was revived in less than a minute by heart massage.” She was then placed in an induced coma before being taken to the intensive-care unit, a procedure Dastry said was “absolutely normal” and performed in order to “avoid unnecessary complications.”
That same day Raymond was transferred to Sao Paulo’s posh and better-equipped Sirio-Libanes Hospital where she is recovering, Dastry said without providing further details.

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