Self-explanatory domain name with a clear, medical purpose.
The word "CardiacGuard" contains 12 letters and three syllables. Established brands using three syllable names include Nescafé, Delicious and Mastercard.
Cardiacguard.com is a dot com domain. Dot com domains are the most valued top-level-domain in the world, used by famous websites like google.com. When most people think of a website, they think of a dot com.