It is often said, If you are not able to answer a question, in a single line, or if the explanation is too long, then the answer is likely to be vague and difficult. So does this question.
It is a very practical probelm in day to day cardiology practice faced by every one of us. Still, it is often taken for granted during echo lessons in cardiology schools.
Here is a big table of differences listed. Read it if you have time.
There are only three words important. Find it out.
Final message
Look beyond septum, concentrate both systole and diastole. Normal systolic thickening and beaking in M-mode, clinch the diagnosis as LBBB
A query for advanced readers.
If LBBB and CAD /DCM co-exists, (a common scenario ) Which component of wall motion defect dominates ?
The answer to this question becomes important, as only the electrical component is correctable by CRT (or CSP now). No surprise, there is huge chunk of non responders, where myocardial component of de-synchrony prevails over the electrical LBBB,
Dr.S.Venkatesan MD 