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What is happening during a complete heart block?
Complete heart block is where the electrical impulses from the SA node of the heart cannot reach the ventricles along the normal pathway. Instead the atrial contract from the SA node singles and the ventricles contract from the ventricular cells
In a normal ECG trace, what does a QRS wave indicate?
the contraction of the ventricles
What happens when a persons ventricles have thinner walls then normal?
it breaks more easily
The normal heart sounds heard through a stethoscope are caused by the contractions of the ventricles?
Normal heart sounds (often called lub-dub) are caused by the pressure changes in the ventricles closing the various heart valves. The first sound, lub, is caused by the closing of the atrioventricular valves after the ventricles have filled with blood and as the ventricles begin to contract. The second sound, dub, is caused by the closing of the semilunar valves as the ventricles relax after pushing blood forward.
How does a normal heartbeat sound?
makes two sounds, "lubb" when the valves between the atria and ventricles close, and "dupp" when the valves between the ventricles and the major arteries close
What is the QRS spike of an ECG mean?
a group of waves depicted on an electrocardiogram; it actually consists of three distinct waves created by the passage of the cardiac electrical impulse through the ventricles and occurs at the beginning of each contraction of the ventricles. In a normal electrocardiogram the R wave is the most prominent of the three; the Q and S waves may be extremely weak and sometimes are absent.
What does the t wave represent on an ecg?
It represents the repolorization of the ventricles. The ventricles must reset electrically after contracting. In a normal Sinus Rhythm the p wave comes first. Then the QRS complex which is the largest part of the heartbeat will come less than .2 seconds later. The QRS complex usually lasts less than .12 seconds. The final bump is (usually) the T wave.
What is the relationship between pulse rate and recovery time after exercise?
recovery time makes the pulse rate normal=)
What is the normal antifreeze level in the coolant recovery tank?
Normal antifreeze levels in the coolant recovery tank are around the half way point. This is usually marked with an Full or F on the side.
What is the Recovery time for normal house work after tubal ligation?
a week is the normal recovery.. However when I had mine tied, I suffered from a UTI for 3 days. It was the worse I have ever had.. My recovery took almost 3 full weeks of rest before I felt better.
What a normal pri measurement?
A normal PRI (P-R interval) measurement on an electrocardiogram (ECG) typically ranges from 120 to 200 milliseconds. It represents the time taken for electrical impulses to travel from the atria to the ventricles, indicating proper conduction through the heart's electrical system. Values outside this range may suggest various cardiac conditions, such as atrioventricular block or other conduction abnormalities. Regular monitoring of the PRI can be crucial for assessing heart health.
What causes the normal delay in transmission at the AV node What is the importance of this delay for cardiac function?
The delay occurs within the fibres of the AV node. It is important because it allows the atria to complete their contraction and empty their blood into the ventricles before the ventricles contract. There is a short delay (1 m/second) in transmission of the impulse to the ventricles.
