I could not decide in what direction to go so I tested out the stethoscope idea a litle further:

Any critique is most welcome.

As I quickly loaded and scanned down the page I saw Starbucks right away.

Oops. I meant to add that the mark itself is nice, but you might want to reconsider the rest.

Crud. I also want to say I did like the simplicity of the first although the L was a little abnormally shaped. Like a short man with big feet.

Does the heart in the new mark have to be closed. In your sketches, at the top on the far right, that implies a heart without being blunt.

Thanks for your comments Miss Tiffany.
I see what you mean

I'll try to open up the heart in the mark and get some longer legs on the "L", thanks for noticing.

Longer legs looks better

I love the heart/stethoscope mark. The gradients dull the contrast in your logo, and make it look less clean - I'd get rid of them.

I really like the reversed version - it looks much cleaner and appropriate for a medical centre than the top example. I think it could work on white if you just removed the outermost stroke. I'd also remove the black stroke around the centre circle to make it less busy.

The green colour really evokes Starbucks to me. I'd go with blue instead. Try to work in some red or pink into the mark - maybe just in the small circle within the heart.

Overall, great work.

- Lex

Tried to open the heart as Miss Tiffany suggested, I was afraid to get a face with two angry eyebrows but I think it works better now? More stethoscopic without loosing the heart. Thanks again for seeing that.

Hi Lex, thanks for commenting. Removing excess decorations seems like a good idea. I am not shure about the outermoust circle, I think it looks a bit ragged without it?
Tried some blue and red as you suggested, good call, well appreaciated.

Nice work! I like it with the outer circle. It works with and without color.

Sharon

Sorry - I was unclear about what I meant when I said to remove the outermost circle.

I meant that you should use the "reversed" version of the logo on white instead:

I like the new colours too. Good work.

- Lex

Thanks Sharon! I think the small versions with the circle looks nice, trying to fugure out why.

Thanks for making the drawing Lex, I should have understood your explanation right away. I see what you mean now.
Here it is with one, two and three circles.
Looking into the weights of the symbol, it is becomming almost like a glyph to me. Maybe I could find a font that looks related to the symbol?