Władysław IV Vasa

c The confusion stems from an undisambiguated use of the Polish medical term "kamica" in the cited reference work (Czapliński 1976). Czapliński also mentions that Władysław suffered from ill health throughout his life, related to obesity, rheumatism and kidney issues. There were months-long periods, particularly in 1635 and 1639, he could not walk.