Observe & prepare safely
If you can do so safely and have no reason to avoid standing measurements, note heart rate/blood pressure and symptoms after resting and after standing; stop if you feel faint or unsafe.
Research orientation · Neurology & Nerve
Heart racing or dizziness on standing with a normal ECG: what should be checked next?
A resting ECG answers a different question from symptoms that appear specifically after standing. A structured investigation can separate positional physiology from anemia, thyroid/medication factors, deconditioning and other causes while identifying what evidence is most useful to bring to a clinician.
This page is general research orientation. It cannot diagnose you or determine that it is safe to delay medical care.
Initial research compass
Three ways to make the next step more informative.
Audit records & evidence
Review anemia/iron, thyroid, electrolyte and medication history, and compare symptom onset with illness, deconditioning or other major changes.
Bring a focused question to a clinician
Bring a positional symptom/heart-rate log to the clinician and ask whether formal orthostatic testing or another cardiovascular/neurological explanation is more appropriate.
Important: these are research-orientation ideas, not instructions to self-diagnose, stop prescribed treatment, or perform unsafe home testing. If symptoms may be urgent, seek appropriate in-person care first.
Why a deeper interview can help
A short web page cannot reconstruct a longitudinal medical case.
A full WhatDx case can ask follow-up questions based on your answers, review the records you upload, reconstruct chronology, track treatment response and compare competing explanations across specialties. It then produces a research dossier that you can discuss with a clinician.
The free suitability check is the right next step if you want a case-specific answer about whether that process is likely to add value.
Run the free suitability checkCommon questions
Before you use this guide.
Is this page telling me what condition I have?
No. The same symptom pattern can have many causes, and this page does not have your full history, examination or records. It is intended to organize useful questions, not name a diagnosis.
What if my previous tests were “normal”?
Normal results can be genuinely reassuring, but their meaning depends on what was tested, when it was tested and which question the test can actually answer. A research process can help map that context without assuming that “normal” means “nothing is wrong.”
What does the paid WhatDx session provide?
A detailed adaptive interview, record review, a persistent 90-day case state and an evidence-linked research dossier. It is research support, not prescribing or treatment.