I’d argue smoking anything isn’t good for your heart and lungs but this talks about THC having heart affects as well
https://www.cnn.com/2020/08/05/healt...ess/index.html
The statement found using weed has "the potential to interfere with prescribed medications" as well as "trigger cardiovascular conditions or events, such as heart attacks and strokes,"
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Tetrahydrocannabinol can also cause a faster heart rate, increase the heart's need for oxygen, disrupt the walls of arteries and contribute to higher blood pressure while prone, according to other studies.