Is it possible for an alien organism to survive on earth?

Let's assume that our intelligent alien organism is living on an earth like planet with an atmosphere but higher gravity. Its world is on the verge of doom. Somehow it could make it to earth with a spaceship. Here are some facts of the home world and our alien organism:

• gravity is around 3G - 4G
• atmosphere is breathable (let's say it's like our air for the simplicity of this question)
• blood-like-system transporting oxygen to the organs but with the ability to control its own blood pressure
• can also control its own heartbeat frequency (is able to sustain a heartbeat frequency that is up to 3 times higher compared to a human and also able to reduce it to a minimum to keep its organ to work)

QUESTION:

Can this organism survive on earth without a pressure suit?

I've read these questions but they don't answer my question
How long can humans survive in increased gravity?
Would a species evolved for very high environmental pressure necessarily die in lower pressures?

posted about 6 years ago

D3f4u1t‭

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