I just started getting into yoga!  Do you participate in it?
I prefer the Hatha type of yoga over Raja.  Do you have a preference?
What is Hatha yoga?  I have never heard of it!
Hatha yoga is a branch that emphasizes physical exercises to master the body and mind.
Interesting!  An what exactly is Raja yoga?
You may have heard of it being referred as "royal yoga" or "classical yoga."
I am assuming that is the type of yoga with all the different stretching poses, right?
I think that style of yoga is called Yin yoga.  
Oh!  There are so many different types.  I had no idea!  How long has yoga been practiced?
to pre-Vedic Indian traditions; it is mentioned in the Rigveda, but most likely developed around the sixth and fifth centuries BCE, in ancient India's ascetic and śramaṇa movements. The chronology of earliest texts describing yoga-practices is unclear, varyingly credited to Upanishads. The "Yoga Sutras of Patanjali" date from the first half of the 1st millennium CE, but only gained prominence in the West in the 20th century. Hatha yoga texts emerged sometimes between the 9th and 11th century with origins in tantra.
Yoga
and aims to support the mind, spirit and body of cardiovascular patients.
Inspiration.
The actual type of yoga that cardiac yoga can be connected with could be Hatha Yoga. It aims to achieve balance between the body and the mind, incorporating breathing exercises as well as meditation. It is often used for healing the body in a natural way, rather than using western medications. Hatha yoga uses physical poses called asanas, which would be modified slightly in cardiac yoga. The word asana is Sanskrit for “seat”