Abnormalities of heart valves can be detected more accurately by auscultation than by ECG. why is this so?

i don't know if this statement can be made as it is a bit too general.

certain heart valve conditions are picked up better with an ecg than with auscultation

keep in mind that an early heart valve defect will be hard to diagnose at the start.

an ecg (aka ekg) will pick up the vector (eclectic) and so if there is no electric potential change (ie hypertrophy, atrophy) then you can't expect an ecg to diagnose the problem.

that is why auscultation always precedes ecg and other lab work.

Echocardiogram will help diagnose issues with your heart valves. Using auscultation and then an echo can be of value. An EKG will record the electrical activity of the heart. The waves of the heart beat are related to the contractions of the heart. This can detect abnormal cardiac rhythms and heart damage. Hope that this helps.

ecg (EKG) only records the electrical conduction of the heart cells. since the heart is actually a two mechanism pump, electrical and mechanical, the ecg can't detect the mechanical aspects of heart abnormality. however if the mechanical abnormality in some way results in electrical dysfuction then that electrical component will be picked up, but will not reflect on anything mechanical.

now the mechanical side is generally evaluated first by auscultation. certain sounds are typical of certain mechanical malfunction. if more investigation is necessary then an echocardiogram is ordered which evaluates the heart by sound waves the way a pregnant woman gets a look at her baby through the abdomen by sonography. should further evaluation be needed then radiography or invasive technology is available.