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What happens to blood flow when cardiac tamponade occurs?
GaleEncyofMedicine
Because the lower chambers (the ventricles) cannot fill with the correct amount of blood, less than normal amounts of blood reach the lungs and the rest of the body. This condition is very serious and can be fatal if not treated.
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What is ischemic heart tissue?
Ischemia occurs when there is not enough oxygenated blood reaching the cardiac muscle cells.
Amount of blood pumped by the heart in 1 min?
cardiac output :)
What occurs during atrial systole?
A. systole causes a complete emptying of all blood from the ventricle B. systole increases the pressure in the ventricles ejecting blood out through the cardiac outflow tracts C. systole occupies a longer period of time than does diastole. D. systole is the phase of the cardiac cycle when the heart fills with blood. E. None of the above
What will happen if excessive fluid collects in the pericardial sac?
If too much fluid (more then 200 ml) builds up in the pericardial sac, a condition called cardiac tamponade may occur. This is a condition where the fluid build up is so great that is pushes on the heart and constricts it. The heart is not able to pump hard enough to supply sufficient blood to the body. The symptoms of cardiac tamponade include Beck's triade: Jugular vein distention (enlarged neck veins), muffled heart sounds, and narrowed pulse pressure (systolic blood pressure, the first number in a blood pressure, decreases, while diastolic blood pressure, the second number, increases). If not treated the patient will eventually go into shock because the heart cannot pump effectively. In this case the physician must perform a pericardiocentesis, in which he or she inserts a syringe into the pericardial sac and draws off the extra fluid.
How much blood returns to the heart?
cardiac output
What happens to blood pressure and flow when cardiac tamponade is brought on by trauma?
When tamponade occurs because of trauma, the sound of the heart beats can become faint, and the blood pressure in the arteries decreases, while the blood pressure in the veins increases.
What is the medical condition cardiac tamponade?
Compression of the heart that occurs when the pericardium fills with blood or fluid. This increase in pressure outside the heart interferes with heart function and can result in shock and/or death.
When the pericardium fills with blood it produces a condition called cardiac tamponade which can be rapidly lethal. why is thi condition so dangerous?
Cardiac tamponade is dangerous because it can interfere with the heart's pumping capability. As pressure within the pericardium increases, the heart's chambers are unable to fill sufficiently to allow enough blood to reach the rest of the body.
What is a description of cardiac tamponade?
The condition keeps the rest of the body from getting the necessary supply of oxygen and can cause dangerously low blood pressure.
How useful is blood pressure medication in treating cardiac tamponade?
Drugs that help maintain normal blood pressure throughout the body can also help this condition; however, these drugs are only a temporary treatment.
How would you define cardiac tamponade?
Sometimes fluid collects between the heart and the pericardium called pericardial effusion. When the fluid accumulates, it can squeeze the heart and prevent it from filling with blood.
What three dangerous conditions can result from cardiac tamponade?
A reduced amount of blood is pumped to the body by the heart, the lower chambers of the ventricles are filled with a less than normal amount of blood, and higher than normal blood pressures occur inside the heart?
The period of time during a cardiac cycle when contraction occurs and blood pressure rises?
systole
What is cardiac ablation and what occurs?
Cardiac ablation is a procedure where they remove a faulty electrical pathway from the heart. They do this by inserting a is advance a flexible catheters into a blood vessel.
What is ischemic heart tissue?
Ischemia occurs when there is not enough oxygenated blood reaching the cardiac muscle cells.
How does cardiac tamponade cause cyanotic?
Cardiac tamponade is a condition caused by rapid buildup of fluid (usually blood, but some conditions cause other fluids to collect) in the pericardial sac (see question below for definition of pericardium). Small amounts of fluid or fluid that accumulates over a long period of time does not cause problems, but when the fluid volume becomes too high or it accumulates rapidly, the pressure within the pericardium rises and may eventually lead to compression of the cardiac chambers, restricting filling and emptying. This is most prominent in the right sided chambers, specifically the right atrium and ventricle. Restriction of filling results in a decrease in cardiac output and eventually hypotension, shock, and (if uncorrected) death. This is a not uncommon cause of PEA (pulseless electrical activity) in traumatically injured patients. Signs and symptoms of cardiac tamponade include the classic signs of hypotension/shock, jugular venous distention and muffled heart sounds. Together, these signs bear the eponym "Beck's triad." Not all patients with cardiac tamponade will have all of these signs, however. Clinical suspicion in the appropriate setting still plays a major role in diagnosis. Other signs include those caused by these three core signs - altered mental status, weak or absent peripheral pulses, cyanosis, respiratory distress or failure, diaphoresis, tachycardia as the heart tries to compensate for a decreased output and hypotension, decreased urine output, and others. Diagnosis of cardiac tamponade is done either on appropriate clinical suspicion in appropriate patients and physical exam or by ultrasound at the bedside. Rapid bedside ultrasound will reveal a large pericardial effusion with compression of the R heart structures, particularly in diastole. This is diagnostic of cardiac tamponade. Treatment includes pericardiocentesis at bedside, either blindly or ultrasound guided or emergent pericardial window in the OR. In traumatic cases, particularly penetrating trauma, the cause is an atrial or ventricular injury or proximal aortic injury and these treatments will cause only temporary improvement with worsening again upon reaccumulation of blood. In this case, the treatment is thoracotomy and primary repair of the cardiac injury. Emergency thoractomy may be performed in the emergency department as a temporizing measure to give the patient time to make it to the OR when vital signs are lost, but overall mortality is high. See the related questions for more information.
What likely happens to the heart rate as the cardiac muscle it gets Stronger?
It starts pumping more blood.
