IGHE and atrial fibrillation: Detection of Asp f 3 IgE in a subject with AF sensitization strongly suggests a distinct fungal species is the primary sensitizer if concomitant Asp f 1 and/or Asp f 2 IgE are not detected; if they are, it is interpreted as a more complex molecular profile, usually associated with more pronounced molecular spreading, long‐standing AF sensitization, and higher IgE levels.