PHENOTYPE · CARDIAC & AUTONOMIC
The current record includes rhythm diagnoses and procedures, syncope and orthostatic symptoms, breathing and oxygenation events, temperature and sweating differences, urinary findings, hydration sensitivity, and explicit negative event correlations. These signals require ordinary cardiology, autonomic, respiratory, neurologic, renal, and endocrine differentials.
SIX PHYSIOLOGIC SYSTEMS
A positive fact in one component does not imply an abnormality in every component. The source record must retain rhythm, circulation, breathing, temperature, urinary, and hydration variables separately.
Formal and structured records include ventricular ectopy with RVOT-focused ablation, supraventricular tachycardia with ablation, bradycardia during a seizure-related emergency, POTS, prior bundle-branch-block wording, murmur and cardiac-MRI or exercise-workup context, abnormal ECG reports with a relatively normal echocardiogram, and fetal or perinatal rhythm concern.
Fainting, postural dizziness, drop-attack or syncope-like events, urinary incontinence during some events, meal- or squat-to-stand-associated dizziness, and orthostatic intolerance appear in different records.
Breath-holding with distress or movement, out-of-breath episodes, brief sleep-related desaturation, cyanosis described during a severe seizure, and normal oxygen or rhythm during other studies require event-specific interpretation.
Marked sweating at sleep onset, cold extremities, heat intolerance, rapid sweating during dysregulation, beet-red flushing, cold-seeking, and age-related changes in thermal pattern are reported.
Recurrent UTIs, hematuria or proteinuria snapshots, low-growth or contaminated cultures, separate high-count cultures, dark or reduced urine during illness or heat, and later normal urinalysis are represented.
Limited drinking, dehydration-linked seizure concern, saliva pooling or swallowing difficulty, reflux or constipation, exertion-related dysregulation, prolonged tachycardia reports, fatigue, and return-to-baseline timing should be captured without assuming one autonomic mechanism.
SEX × MOLECULAR ARCHITECTURE
Each row is a complete subgroup partition: positive + other mapped + unreported = total people. “Other mapped” means the source contains a negative or unresolved cardiac/autonomic entry without a positive finding. These descriptive counts cannot estimate prevalence.
The presence of formal rhythm diagnoses in selected people justifies prospective ascertainment. It does not establish a shared ASH1L cardiac syndrome.
LONGITUDINAL EVIDENCE
These summaries are de-identified and do not pair events with an exact private variant, age, country, or case label.
One formal history documents ventricular extrasystoles followed by RVOT-focused ablation and continued follow-up. Another familial history describes SVT treated with ablation and later sinus tachycardia.
In one adult event-capture record, the person’s representative spell occurred without tachyarrhythmia. That result narrows the event mechanism while leaving the event clinically important.
Across separate records, urinary evidence includes blood or protein on urinalysis, nonconfirmatory or low-quality cultures, culture-positive infection, and later reassuring controls. Those observations must not be assembled into one person-level sequence or treated as proof of sterile endothelial renal injury.
A caregiver chronology records rapid progression from calm to profuse sweating, breathlessness, and dysregulation. The chronology supports event-level vital-sign capture; it does not identify the mechanism.
One adult history describes severe dizziness after eating and after squat-to-stand despite prior routine evaluations that did not identify an explanation.
One polysomnogram documented normal heart rate and no rhythm disturbance, while an earlier study recorded brief REM-related desaturations interpreted as not requiring treatment. The methods and captured state define the conclusion.
In one child, caregiver history clusters breath-holding or fainting-like events, rapid sweating and heat sensitivity, saliva pooling, swallowing difficulty, reflux, constipation, and fatigue. Co-occurrence makes synchronized capture useful; it does not demonstrate vagal, brainstem, bradycardic, or cerebral-perfusion failure.
One P-tier chronology clusters convulsive breakthrough after several syncopal episodes with low-blood-pressure shorthand, very infrequent urination, visual black spots, prolonged sleep after clobazam, stool change during a ketogenic-style diet, and weight loss. It does not diagnose dysautonomia; it defines a prospective BP, ECG, oxygenation, EEG, medication, diet, urine, and recovery capture plan.
EVENT-CAPTURE STANDARD
A normal echocardiogram does not exclude intermittent arrhythmia; a negative culture does not erase urinary blood or protein; a normal rhythm during one event is highly informative for that event but not every future symptom.
Position, prodrome, heart rate/rhythm, blood pressure, oxygenation, breathing, awareness, movement, duration, injury, recovery; EEG only when seizure is part of the phenotype.
12-lead ECG, symptom–rhythm correlation, ambulatory duration matched to event frequency, medication and exertion timing, hydration, thyroid/electrolyte context as clinically indicated.
Core/environmental temperature, heart rate, blood pressure, hydration, skin color, trigger, medication, endocrine context, duration, and recovery.
Video, airway and sleep context, pulse oximetry quality, ECG/rhythm, event timing, infection, pain, and neurologic correlation when supported.
Symptoms, collection method, urinalysis, microscopy, culture and colony count, hydration, menstruation when relevant, medication, renal function, and repeat testing after recovery.
Orthostatic vitals or formal testing when indicated, heart rate/rhythm, glucose, hydration, medication, meal composition, pain, sleep, and symptom recovery.
CLINICAL BOTTOM LINE
New collapse, cyanosis, breathing difficulty, sustained tachycardia, chest symptoms, severe postural intolerance, or altered responsiveness requires ordinary clinical urgency and differential assessment. The genetic diagnosis should sharpen—not replace—that evaluation.