がい収縮 しゅうしゅく せい不整 ふせい みゃくでしょう
kigaishūshuku sei fuseimyakudeshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of 期外収縮性不整脈

1. Premature ventricular contraction arrhythmia likely.; Probably premature ventricular contraction.

Polite
Presumptive
Conjecture