facet_id	group_id	label	n_query_hits	n_mesh_hits	n_articles_any
adolescent_growth_spurt	comorbidity	Onset with adolescent growth spurt	2	1	3
anxiety_depression	comorbidity	Anxiety and depression	230	94	242
arrhythmia_differential	comorbidity	Arrhythmias and inappropriate sinus tachycardia (rule out)	105	71	138
chronic_migraine	comorbidity	Migraine and chronic headache	202	54	210
differential_syncope_oh	comorbidity	Competing orthostatic diagnoses	458	261	549
endometriosis	comorbidity	Endometriosis	7	2	7
fibromyalgia	comorbidity	Fibromyalgia	65	16	66
functional_neurological_disorder	comorbidity	Functional neurological disorder	6	1	7
gi_dysmotility	comorbidity	Gastrointestinal dysmotility and functional GI disorders	174	26	176
hormonal_transition_onset	comorbidity	Onset with hormonal change	49	31	58
hypermobility_heds	comorbidity	Joint hypermobility and hypermobile Ehlers-Danlos syndrome	198	91	203
iron_deficiency	comorbidity	Iron deficiency	5	2	5
long_covid	comorbidity	Long COVID and post-acute sequelae of SARS-CoV-2	313	153	315
mast_cell_activation	comorbidity	Mast cell activation syndrome	100	26	104
me_cfs	comorbidity	ME/CFS and post-exertional malaise	441	136	454
medication_induced_tachycardia	comorbidity	Medication-induced tachycardia (rule out)	17	5	18
neurodevelopmental_disorder	comorbidity	Autism and ADHD	17	4	18
physical_trauma_onset	comorbidity	Onset after trauma or concussion	21	9	22
post_vaccination_onset	comorbidity	Post-vaccination onset	114	54	115
prolonged_bed_rest	comorbidity	Prolonged bed rest	9	11	15
secondary_sinus_tachycardia	comorbidity	Other causes of sinus tachycardia (rule out)	40	14	44
sleep_disturbance	comorbidity	Sleep disturbance	40	15	45
small_fiber_neuropathy_dx	comorbidity	Small fibre neuropathy diagnosis	66	19	68
structural_cardiopulmonary_disease	comorbidity	Structural heart and chronic lung disease (rule out)	33	12	42
surgery_onset	comorbidity	Onset after surgery	66	0	66
systemic_autoimmune_disease	comorbidity	Sjogren and other systemic autoimmune disease	44	28	65
active_stand_test	measurement	Active stand test	127	274	386
ambulatory_monitoring	measurement	Ambulatory heart rate and blood pressure monitoring	50	27	60
autonomic_autoantibody_assay	measurement	Autonomic autoantibody assay	12	33	38
cardiac_mri	measurement	Cardiac MRI (left ventricular mass)	10	6	16
cardiopulmonary_exercise_test	measurement	Cardiopulmonary exercise testing	27	49	68
cerebral_blood_flow_measurement	measurement	Cerebral blood flow velocity	131	50	138
end_tidal_co2	measurement	End-tidal CO2 on tilt	41	10	43
genetic_testing	measurement	Genetic testing	111	13	112
head_up_tilt_test	measurement	Head-up tilt table test	466	292	552
heart_rate_variability	measurement	Heart rate variability and baroreflex sensitivity	224	561	655
muscle_sympathetic_nerve_activity	measurement	Muscle sympathetic nerve activity (microneurography)	21	71	77
plasma_blood_volume_assay	measurement	Plasma and blood volume measurement	75	34	85
plasma_catecholamine_assay	measurement	Supine and upright plasma catecholamines	55	72	99
qsart_sudomotor_testing	measurement	QSART and sudomotor testing	26	8	32
quantitative_sensory_testing	measurement	Quantitative sensory testing	5	0	5
regional_norepinephrine_spillover	measurement	Regional norepinephrine spillover	4	51	52
renin_aldosterone_assay	measurement	Plasma renin and aldosterone	31	15	35
skin_biopsy_ienfd	measurement	Skin biopsy and intraepidermal nerve fibre density	26	28	41
thermoregulatory_sweat_test	measurement	Thermoregulatory sweat test	10	5	12
urine_sodium_24h	measurement	24-hour urine sodium	13	4	16
valsalva_maneuver	measurement	Valsalva manoeuvre	98	317	377
autoimmune_evidence	mechanism	Autoimmune evidence	186	53	190
cerebral_hypoperfusion_evidence	mechanism	Cerebral hypoperfusion evidence	181	73	209
deconditioning_evidence	mechanism	Deconditioning evidence	105	42	129
hyperadrenergic_evidence	mechanism	Hyperadrenergic evidence	226	139	277
hypovolemic_evidence	mechanism	Hypovolemic evidence	177	49	188
neuropathic_evidence	mechanism	Neuropathic evidence	235	169	344
postinfectious_evidence	mechanism	Post-infectious evidence	334	157	338
antihistamine_therapy	treatment	Antihistamines and mast cell stabilisers	8	4	10
auricular_vagus_nerve_stimulation	treatment	Auricular vagus nerve stimulation	16	7	18
beta_blocker_therapy	treatment	Beta blockade	131	67	152
central_sympatholytic_therapy	treatment	Central sympatholytics	10	14	19
compression_therapy	treatment	Compression garments	66	5	66
droxidopa_therapy	treatment	Droxidopa	5	2	5
exercise_reconditioning	treatment	Exercise reconditioning	141	81	186
immunomodulatory_therapy	treatment	Immunomodulation	42	17	46
ivabradine_therapy	treatment	Ivabradine	102	34	107
lifestyle_modification	treatment	Behavioural and dietary measures	51	3	52
midodrine_therapy	treatment	Midodrine	54	27	61
offending_medication_withdrawal	treatment	Stopping drugs that worsen POTS	1	1	2
phenobarbital_therapy	treatment	Phenobarbital	7	2	7
physical_countermaneuvers	treatment	Physical countermaneuvers	8	30	37
prokinetic_therapy	treatment	Prokinetic agents	3	1	4
pyridostigmine_therapy	treatment	Pyridostigmine	22	10	25
serotonergic_therapy	treatment	Serotonergic and other central agents	14	6	16
volume_expansion_therapy	treatment	Volume expansion therapy	62	50	93