Webmd is an excellent resource for preliminary information regarding a vast majority of health concerns and questions. While it is no substitute for a doctor you can get a lot of good basic information to help you.
An enlarged heart is considered to be a heart muscle condition. It is a symptom of an other body disorder that is likely causing the heart to work harder than normal. Apparently it is treatable as well, and you can find more information on this great medical site: http://www.mayoclinic.com/health/enlarged-heart/ds01129
There are many websites online that have information on heart murmurs. WebMD is one website that has information on heart murmurs as well as symptoms.
There are various ways to get information. Web MD online provides information in lay language. American heart association also has good information.
You could visit nutritiondata.com for healthful information.
One can find out more information about fetal heart rates from ones doctor, OB, nurse, online or in books. Parenting magazine often have this info as well.
There is a wealth of information regarding heart attacks available online. Some examples of websites to research include en.wikipedia.org/wiki/Myocardial_infarction and www.emedicinehealth.com
One can find information on gastric bypass by speaking to their doctor or heart specialist. One can find information online as well, but talking in person with a health professional would be the best choice.
You can get information on the symptoms of heart attacks through websites like www.WebMD.com or other companies that offer medical advice online or in print.
There is a lot of information in the mayo clinic site, also the united heart association site has information on where to get more information. those are trusted sites,
There are many websites online that offer information about heart valve surgery. Some examples are: "Wikipedia", "Medtronic", "Bupa", "HeartandStroke", "TexasHeartInstitute", and many more.
There are a number of places you can go online to find more information about lowering your triglycerides. One great place I found is here: http://www.optimal-heart-health.com/diettolowertriglycerides.html
The Cleveland Heart Clinic is one of the top Hospitals when it has to do with hear surgery. Their website has a plethora of information on this subject.