The irregular heartbeats can lead to discomfort, such as the feeling that the heart is skipping beats (palpitations). Uncommonly, the irregular heartbeats can cause fainting (syncope), and even more rarely, sudden death. [ghr.nlm.nih.gov]

This, as in other forms of long QT syndrome, can lead to abnormal heart rhythms such as ventricular ectopy or ventricular tachycardia causing palpitations. [en.wikipedia.org]

All seven patients reported episodes of palpitations, while three of them associated it with presyncope or syncope (42.8%). Two subjects (28.5%) had a history of periodic paralysis. [innovationsincrm.com]

Palpitations, Syncope, or Cardiac Arrest Syncopal episodes are often interpreted as a neurologic problem rather than arrhythmia. Physical examination and ECG should be part of the evaluation of syncope. [ncbi.nlm.nih.gov]

The irregular heartbeats can lead to discomfort, such as the feeling that the heart is skipping beats (palpitations). Uncommonly, the irregular heartbeats can cause fainting (syncope), and even more rarely, sudden death. [ghr.nlm.nih.gov]

hands and feet, and at least two of the following: Low-set ears Widely spaced eyes Small lower jaw (mandible) Fifth-digit clinodactyly (curved pinky finger) Syndactyly or 2. [rarediseases.info.nih.gov]

Additional findings include small hands and feet, loose joints, and abnormal sideways curvature of the spine (scoliosis). [rarediseases.org]

Novel findings include small hands and feet ( Note: Isolated reports of renal anomalies include unilateral hypoplastic kidney [ Andelfinger et al 2002 ] and renal tubular defect [ Davies et al 2005 ]. [ncbi.nlm.nih.gov]

The clinical diagnosis of ATS was performed by the presence of at least two of the following criteria: 1) familial periodic paralysis; 2) characteristic facies, dental abnormalities, or small hands/feet, and at least two of low-set ears, widely spaced [innovationsincrm.com]

Presence of 2 of the following 3 criteria: ‐ Periodic paralysis ‐ Symptomatic cardiac arrhythmias or ECG evidence of enlarged U‐waves, ventricular ectopy or a prolonged QTc or QUc interval ‐ Characteristic facies, dental anomalies, small hands and feet [doi.org]

This condition is inherited in an autosomal dominant pattern. 0000337 Bulbous nose 0000414 Cleft palate Cleft roof of mouth 0000175 Clinodactyly of the 5th finger Permanent curving of the pinkie finger 0004209 Clinodactyly of the 5th toe 0001864 Delayed [rarediseases.info.nih.gov]

Additional facial features include a round (bulbous) nose, a thin upper lip, a triangular-shaped face, highly-arched roof of the mouth (palate), a cleft palate, and underdevelopment of the cheek bones (malar hypoplasia). [rarediseases.org]

Characteristic facies include broad forehead, short palpebral fissures, wide nasal bridge with bulbous nose, hypoplasia of maxilla and mandible, thin upper lip, and a triangular face. [ncbi.nlm.nih.gov]

U-waves on ECG recording ( Figure 1 ). [innovationsincrm.com]

ECG was notable for prominent U waves, with sinus rhythm and a normal QT interval. Genetic screening identified a heterozygous mutation in the KCNJ2 gene. The patient returned during an attack for nerve conduction and needle EMG studies. [neurologytimes.com]

U wave; (3) at least two of the following dysmorphic features: low-set ears, wide-set eyes, a small mandible, fifth-digit clinodactyly, and syndactyly; and (4) a family member with confirmed Andersen–Tawil syndrome.Genetic testing can be used to identify [en.wikipedia.org]

U wave or prolonged QTc. [ncbi.nlm.nih.gov]

An electrocardiogram or EKG records the heart’s electrical impulses and may reveal abnormal electrical patterns or activity commonly associated with Andersen-Tawil syndrome including prominent U waves, prolonged QU intervals, prolonged QT intervals, premature [rarediseases.org]