Cannabis

Hello nakula2009, very good question, not a mainstream one, but still clever. The main psychoactive ingredient of cannabis is THC, which produces mixed reactions in the body, usually sarting tne minutes after ingestion. The mixed symptoms can be relaxing effects or stimulating properties. Now, the excitatory effects may influence the function of a part called hippocampus that anatomically have connections with the hindbrain that is mainly responsible for autonomic control of vital parameters. This can in certain ways disturb the normal rhythm thus increasing adrenaline in the body. By experiencing this, a phenomena called Na+/K+ pump located in all cells may suffer some desynchronization thus allowing more Potassium (K+) in the blood plasma. Elevated potassium - in the case of cardiac muscle cells - can elongate the contraction period of the heart, thus causing a so-called premature ventricular contraciton (PVC). However, this kind of phenomena is nowadays considered as a benign "reorganization" made by the heart itself, in order to reassess regular rhythm. Medical literature mentions that people with preexisting and known cardiac disorders, like atrial fibrillation etc. may be at higher risk, however, no case of arrhythmia caused by these conditions has been reported. No worries, feel free to smoke. Hope I was helpful. :)

Quite conceivable, because the pulse rate increases will also increase the heart rate. Whether it comes to rhythm problems to me now is not known. Close but not from the heart as well as performance increases even when the pulse rises.