Hi friend,
Welcome to Health Care Magic
The limited information provided is not sufficient enough to arrive at an appropriate conclusion.../ You have not stated your personal habits, family history, or co-morbidities, even age or gender...which could influence the diagnosis and outcome...
Aneurysm,
pericardium, explosions are far fetched ideas and have no scientific basis, in this situation...
You need investigations...
Irregular heart beats need to be DOCUMENTED by ElectroCardioGram (EKG). / Standard ECG records the electrical activity of the heart, for a few seconds. It can detect the
arrhythmia occurring during that time only. If the episode occurs randomly or precipitated by a specific activity like exercise, one needs Holter or event monitor
Neurologic assessment is may be necessary /
MRI may be needed. MRA (MRI
angiography) shows blood vessels and is generally done at the same sitting.
Discuss with your doctor
Take care
Wishing speedy recovery
God bless
Good luck