Counting 1 139 days from November 30, 2021, there were 1 checks done on professional.heart.org's availability. Professional.heart.org was functional 1 times from the aggregate tests performed, last operable November 30, 2021, and replying with 200 status code. No periods of inoperability were observed for professional.heart.org across all assessments made as of January 12, 2025. Of all the replies received, as of January 12, 2025, any response was not indicated as having an error status. Against an average of 2.196 seconds, 2.196 seconds was professional.heart.org's response time on November 30, 2021.