Question about interpreting an ECG?!
Question: Question about interpreting an ECG!?
A person is feeling tired much of the time, and dizzy when he exercises!. On his ECG, he has no P waves, but does have normal QRS complexes and T waves!. Are the right and left atria contracting in this person!? Are the ventricles contracting!? What is happening to the amount of blood his heart can pump out with every beat!?
for my physiology class !.!.!.!. thanks!Www@Answer-Health@Com
for my physiology class !.!.!.!. thanks!Www@Answer-Health@Com
Answers:
normally the atria contract first which corrosponds to the P wave on the ECG and then the ventricles contract which corresponds to the QRS complex!. the T wave signifies repolarization of the ventricles (sort of like the heart resetting itself and getting ready for the next beat)!.
if there are no P waves on the ECG it means that the atria are not contracting properly!. they may not be contracting at all or they may be in a state of constant contraction and relaxation (called atrial fibrillation)!.
if the QRS complexes are normal then the ventricles are contracting properly!. however, the atria, when contracting properly, push blood into the larger ventricles before they contract!. therefore, if the atria are not contracting properly then the ventricles will not be filled with as much blood as usual and will not pump as much blood as usual!. this could definitely make someone feel weak and dizzy!.Www@Answer-Health@Com
if there are no P waves on the ECG it means that the atria are not contracting properly!. they may not be contracting at all or they may be in a state of constant contraction and relaxation (called atrial fibrillation)!.
if the QRS complexes are normal then the ventricles are contracting properly!. however, the atria, when contracting properly, push blood into the larger ventricles before they contract!. therefore, if the atria are not contracting properly then the ventricles will not be filled with as much blood as usual and will not pump as much blood as usual!. this could definitely make someone feel weak and dizzy!.Www@Answer-Health@Com
http://medinfo!.ufl!.edu/~ekg/2%20lists%20!.!.!.Www@Answer-Health@Com