Phenotypes associated with the disease short QT syndrome type 1 (OMIM:609620):
- Shortened QT interval (HP:0012232): Decreased time between the start of the Q wave and the end of the T wave as measured by the electrocardiogram (EKG). Evidence: PCS. (PMID:14676148)
- Cardiac arrest (HP:0001695): An abrupt loss of heart function. Evidence: PCS. (PMID:14676148)
- Palpitations (HP:0001962): A sensation that the heart is pounding or racing, which is a non-specific sign but may be a manifestation of arrhythmia. Evidence: PCS. (PMID:12925462)
- Syncope (HP:0001279): A transient loss of consciousness (i.e., characterized by a rapid onset, a short duration, and a spontaneous and complete recovery) due to cerebral hypoperfusion. Evidence: PCS. (PMID:12925462)
- Paroxysmal atrial fibrillation (HP:0004757): Episodes of atrial fibrillation that typically last for several hours up to one day and terminate spontaneously. Evidence: PCS. (PMID:14676148)
- Autosomal dominant inheritance (HP:0000006): A mode of inheritance that is observed for traits related to a gene encoded on one of the autosomes (i.e., the human chromosomes 1-22) in which a trait manifests in heterozygotes. In the context of medical genetics, an autosomal dominant disorder is caused when a single copy of the mutant allele is present. Males and females are affected equally, and can both transmit the disorder with a risk of 50% for each child of inheriting the mutant allele. Evidence: PCS. (PMID:14676148)
- Sudden cardiac death (HP:0001645): The heart suddenly and unexpectedly stops beating resulting in death within a short time period (generally within 1 h of symptom onset). Evidence: PCS. (PMID:14676148)