{"Name":"Atrial standstill","DiseaseID__c":"GARD:0016564","id":16564,"encodedName":"atrial-standstill","IsDeleted":false,"Disease_Name_Full__c":"Atrial standstill","Xref_IDs__c":"450919004; C0541782; C563984; C62242; HP:0025478; MEDGEN:639047; MONDO:0015281; ORPHA:1344","USA_Estimate__c":null,"No_of_Specialist_Tagsa__c":3,"No_of_ClinGen_records__c":0,"No_of_GeneReviews__c":0,"No_of_HHS_records__c":0,"World_Estimate__c":null,"No_of_HRSA_records__c":0,"Evidence_Based_Score__c":0,"No_of_Disease_Descriptions__c":3,"Disease_Characteristics_Score__c":7,"No_of_Age_at_Onset__c":1,"Description_Source__c":"MONDO:0015281","Disease_Description__c":"A rare cardiac rhythm disease characterized by a transient or permanent absence of electrical and mechanical atrial activity. Electrocardiographic findings include bradycardia, ectopic supraventricular rhythms, lack of atrial excitability and absent P waves.","GARD_Name__c":"Atrial standstill","GARD_Synonym__c":"atrial arrest; atrial cardiomyopathy with heart block; silent atrium; sinus arrest","Curated_Disease_Description_Source__c":"MONDO:0015281","Curated_Disease_Description__c":"A rare cardiac rhythm disease characterized by a transient or permanent absence of electrical and mechanical atrial activity. Electrocardiographic findings include bradycardia, ectopic supraventricular rhythms, lack of atrial excitability and absent P waves.","Curated_USA_Estimate_Source__c":null,"Curated_USA_Estimate__c":null,"Age_at_Onset_Snippet_Text__c":"as an Adult","SourceID__c":"ORPHA:1344","Deprecated__c":"No","Disease_Concept_Type__c":"Rare Disease Grouping","MONDO_ID__c":"MONDO:0015281","ORPHANET_ID__c":"ORPHA:1344","Replaced_By_ID__c":null,"Display_Spanish_Disease_Name__c":"Arresto auricular aislado","Spanish_Description_Source__c":"ORPHA:1344","Spanish_Description__c":"Es una enfermedad rara del ritmo cardiaco caracterizada por la ausencia transitoria o permanente de actividad auricular eléctrica y mecánica. Los hallazgos electrocardiográficos incluyen la bradicardia, los ritmos ectópicos supraventriculares, la pérdida de excitabilidad auricular y la ausencia de ondas P.","Spanish_Disease_Name__c":"arresto auricular aislado","Spanish_GARD_Synonym__c":"miocardiopatía auricular aislada con bloqueo cardíaco","Category_Linearization__c":"ORPHA:97929","icd10_id__c":null,"mesh_id__c":null,"omim_id__c":null,"snomed_id__c":null,"umls_id__c":null,"GARD_Disease__c":[{"Curated_Disease_Description__c":"A rare cardiac rhythm disease characterized by a transient or permanent absence of electrical and mechanical atrial activity. Electrocardiographic findings include bradycardia, ectopic supraventricular rhythms, lack of atrial excitability and absent P waves.","Curated_Disease_Description_Source__c":"MONDO:0015281","GARD_Synonym__c":"atrial arrest; atrial cardiomyopathy with heart block; silent atrium; sinus arrest","Name":"Atrial standstill","estimateUsa":""}],"GARD_Disease_Tag__c":[{"Tag_Name__c":"Genetics","Tag_Category__c":"Cause;Disease Category;Specialist","category_description":"Genetic diseases affect the DNA, or genetic instructions, which directs how tissues, organs, and body systems function.","curated_tag_name":"Genetic diseases"},{"Tag_Name__c":"Cardiology","Tag_Category__c":"Specialist"},{"Tag_Name__c":"Cardiomyopathy","Tag_Category__c":"Account","curated_tag_name":"Cardiomyopathy"},{"Tag_Name__c":"Clinical Cardiac Electrophysiology","Tag_Category__c":"Specialist","curated_tag_name":"Clinical cardiac electrophysiology"}],"Age_At_Onset__c":[{"Age_At_Onset__c":"Adult","Provided_By__c":"ORPHA:1344"}],"External_Identifier_Disease__c":[{"URL__c":"https://browser.ihtsdotools.org/?perspective=full&conceptId1=450919004","Source__c":"C0541782; MONDO:0015281","Xref__c":"450919004"},{"URL__c":"https://www.ncbi.nlm.nih.gov/mesh/C563984","Source__c":"MONDO:0015281","Xref__c":"C563984"},{"URL__c":"https://uts.nlm.nih.gov/uts/umls/concept/C0541782","Source__c":"C0541782","Xref__c":"C0541782"},{"URL__c":"https://www.orpha.net/en/disease/detail/1344","Source__c":"C0541782; MONDO:0015281; ORPHA:1344","Xref__c":"ORPHA:1344"},{"URL__c":"https://www.ncbi.nlm.nih.gov/medgen/?term=639047","Source__c":"C0541782","Xref__c":"MEDGEN:639047"},{"URL__c":"http://purl.obolibrary.org/obo/MONDO_0015281","Source__c":"GARD:0016564","Xref__c":"MONDO:0015281"},{"URL__c":"https://hpo.jax.org/browse/term/HP:0025478","Source__c":"C0541782","Xref__c":"HP:0025478"},{"URL__c":"https://browser.ihtsdotools.org/?perspective=full&conceptId1=5609005","Source__c":"C0541782","Xref__c":"5609005"},{"URL__c":"https://evsexplore.semantics.cancer.gov/evsexplore/concept/ncit/C62242","Source__c":"C0541782","Xref__c":"C62242"}],"GARD_Disease_Gene__c":[{"GeneSymbol__c":"NPPA","Gene_Type__c":"protein-coding gene","Causal_Gene__c":true},{"GeneSymbol__c":"SCN5A","GHR_URL__c":"https://medlineplus.gov/genetics/gene/scn5a","Gene_Type__c":"protein-coding gene","Causal_Gene__c":true}],"Inheritance__c":["Autosomal dominant"],"GARD_Disease_Feature__c":[{"Provided_By__c":"ORPHA:1344","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"A conduction block of the right branch of the bundle of His. This manifests as a prolongation of the QRS complex (greater than 0.12 s) with delayed activation of the right ventricle and terminal delay on the EKG.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0011712","HPO_Synonym__c":"Right bundle branch block; Right bundle-branch block","HPO_Name__c":"Complete right bundle branch block","Feature_System__c":"Cardiovascular System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:1344","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"A myocardial disorder in which the heart muscle is structurally and functionally abnormal, in the absence of coronary artery disease, hypertension, valvular disease and congenital heart disease sufficient to cause the observed myocardial abnormality.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001638","HPO_Synonym__c":"Disease of the heart muscle","HPO_Name__c":"Cardiomyopathy","Feature_System__c":"Cardiovascular System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:1344","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"Left ventricular noncompaction (LVNC) is defined by 3 markers: prominent left ventricular (LV) trabeculae, deep intertrabecular recesses, and the thin compacted layer.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0030682","HPO_Name__c":"Left ventricular noncompaction","Feature_System__c":"Cardiovascular System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:1344","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"Post-exertional symptom exacerbation (PESE), also referred to as post-exertional malaise (PEM), is defined as the worsening of symptoms that can follow minimal cognitive, physical, emotional, or social activity, or activity that could previously be tolerated. Symptoms typically worsen 12 to 72 hours after activity and can last for days or even weeks, sometimes leading to a relapse.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0030973","HPO_Synonym__c":"Exercise-induced malaise; Postexertional malaise","HPO_Name__c":"Postexertional symptom exacerbation","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:1344","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"Difficult or labored breathing. Dyspnea is a subjective feeling only the patient can rate, e.g., on a Borg scale.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002094","HPO_Synonym__c":"Abnormal breathing; Breathing difficulty; Difficult to breathe; Difficulty breathing; Shortness of breath; Trouble breathing","HPO_Name__c":"Dyspnea","Feature_System__c":"Respiratory system","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:1344","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Cephalgia, or pain sensed in various parts of the head, not confined to the area of distribution of any nerve.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002315","HPO_Synonym__c":"Headache; Headaches","HPO_Name__c":"Headache","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:1344","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Description__c":"Any anomaly of the progression of electrical impulses through the heart.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0031546","HPO_Synonym__c":"Abnormality of cardiac conduction; Abnormality of cardiac conduction system; Cardiac conduction abnormalities; Cardiac conduction defects; Heart conduction disorder","HPO_Name__c":"Cardiac conduction abnormality","Feature_System__c":"Cardiovascular System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:1344","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Description__c":"Any anomaly of the P wave of the EKG, which results from atrial depolarization. The P wave occurs when the sinoatrial node creates an action potential that depolarizes the atria.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0031595","HPO_Name__c":"Abnormal P wave","Feature_System__c":"Cardiovascular System","HPO_Feature_Type__c":"Procedure_EKG"}},{"Provided_By__c":"ORPHA:1344","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Description__c":"A ventricular escape rhythm occurs whenever higher-lever pacemakers in AV junction or sinus node fail to control ventricular activation. Escape rate is usually 20-40 bpm, often associated with broad QRS complexes (at least 120 ms).","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0005155","HPO_Synonym__c":"Idioventricular escape rhythm","HPO_Name__c":"Ventricular escape rhythm","Feature_System__c":"Cardiovascular System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:1344","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"The presence of skeletal muscular atrophy (which is also known as amyotrophy).","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0003202","HPO_Synonym__c":"Amyotrophy; Amyotrophy involving the extremities; Muscle atrophy; Muscle atrophy, neurogenic; Muscle degeneration; Muscle hypotrophy; Muscle wasting; Muscular atrophy; Neurogenic muscle atrophy; Neurogenic muscle atrophy, especially in the lower limbs; Neurogenic muscular atrophy","HPO_Name__c":"Skeletal muscle atrophy","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:1344","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"The presence of an abnormality of cardiac function that is responsible for the failure of the heart to pump blood at a rate that is commensurate with the needs of the tissues or a state in which abnormally elevated filling pressures are required for the heart to do so. Heart failure is frequently related to a defect in myocardial contraction.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001635","HPO_Synonym__c":"Cardiac failure; Cardiac failures; Cardiac insufficiency; CHF; Chronic heart failure; Heart failure","HPO_Name__c":"Congestive heart failure","Feature_System__c":"Cardiovascular System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:1344","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"An abnormal sensation of spinning while the body is actually stationary.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002321","HPO_Synonym__c":"Dizzy spell","HPO_Name__c":"Vertigo","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:1344","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Description__c":"Atrial standstill or silent atrium is a rare condition presenting with the absence of electrical and mechanical activity in the atria. It presents with the absence of P waves, bradycardia, and wide QRS complex in the electrocardiogram.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0025478","HPO_Synonym__c":"Silent atrium","HPO_Name__c":"Atrial standstill","Feature_System__c":"Cardiovascular System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:1344","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"A tachycardia originating in the ventricles characterized by rapid heart rate (over 100 beats per minute) and broad QRS complexes (over 120 ms).","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0004756","HPO_Name__c":"Ventricular tachycardia","Feature_System__c":"Cardiovascular System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:1344","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Description__c":"A sensation that the heart is pounding or racing, which is a non-specific sign but may be a manifestation of arrhythmia.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001962","HPO_Synonym__c":"Heart palpitations; Missed heart beat; Palpitations; Skipped heart beat","HPO_Name__c":"Palpitations","Feature_System__c":"Cardiovascular System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:1344","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"A slower than normal heart rate (in adults, slower than 60 beats per minute).","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001662","HPO_Synonym__c":"Brachycardia; Slow heartbeats","HPO_Name__c":"Bradycardia","Feature_System__c":"Cardiovascular System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:1344","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"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.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001279","HPO_Synonym__c":"Fainting spell","HPO_Name__c":"Syncope","Feature_System__c":"Nervous System; Cardiovascular System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:1344","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"The formation of a blood clot inside a blood vessel that subsequently travels through the blood stream from the site where it formed to another location in the body, generally leading to vascular occlusion at the distant site.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001907","HPO_Synonym__c":"Blood clot in blood vessel; Thromboembolic disease; Thromboembolic events","HPO_Name__c":"Thromboembolism","Feature_System__c":"Blood and Blood-Forming Tissue","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:1344","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"A subjective feeling of tiredness characterized by a lack of energy and motivation.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0012378","HPO_Synonym__c":"Fatigue; Tired; Tiredness","HPO_Name__c":"Fatigue","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:1344","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"A sensation of unease in the stomach together with an urge to vomit.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002018","HPO_Synonym__c":"Nausea","HPO_Name__c":"Nausea","Feature_System__c":"Digestive System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:1344","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"A diminution of the volumetric fraction of blood pumped out of the ventricle with each cardiac cycle.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0012664","HPO_Synonym__c":"Reduced ejection fraction","HPO_Name__c":"Reduced left ventricular ejection fraction","Feature_System__c":"Cardiovascular System","HPO_Feature_Type__c":"Imaging_Echocardiogram"}},{"Provided_By__c":"ORPHA:1344","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"An abnormality involving the generation of the action potential by the sinus node and is characterized by an atrial rate inappropriate for physiological requirements. Manifestations include severe sinus bradycardia, sinus pauses or arrest, sinus node exit block, chronic atrial tachyarrhythmias, alternating periods of atrial bradyarrhythmias and tachyarrhythmias, and inappropriate responses of heart rate during exercise or stress.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0011704","HPO_Synonym__c":"Sinoatrial node disease","HPO_Name__c":"Sick sinus syndrome","Feature_System__c":"Cardiovascular System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:1344","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Acute ischemic stroke (AIS) is defined by the sudden loss of blood flow to an area of the brain with the resulting loss of neurologic function. It is caused by thrombosis or embolism that occludes a cerebral vessel supplying a specific area of the brain. During a vessel occlusion, there is a core area where damage to the brain is irreversible and an area of penumbra where the brain has lost function owing to decreased blood flow but is not irreversibly injured.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002140","HPO_Name__c":"Ischemic stroke","Feature_System__c":"Nervous System; Cardiovascular System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:1344","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"An increased concentration of tropnin T in the blood, which is a cardiac regulatory protein that controls the calcium mediated interaction between actin and myosin. Raised cardiac troponin concentrations are now accepted as the standard biochemical marker for the diagnosis of myocardial infarction.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0410174","HPO_Synonym__c":"Increased troponin T level in blood","HPO_Name__c":"Increased circulating troponin T concentration","Feature_System__c":"Cardiovascular System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:1344","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"Any cardiac rhythm other than the normal sinus rhythm. Such a rhythm may be either of sinus or ectopic origin and either regular or irregular. An arrhythmia may be due to a disturbance in impulse formation or conduction or both.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0011675","HPO_Synonym__c":"Abnormal heart rate; Arrhythmias; Cardiac arrhythmia; Cardiac arrhythmias; Cardiac rhythm disturbances; Heart rhythm disorders; Irregular heart beat; Irregular heartbeat","HPO_Name__c":"Arrhythmia","Feature_System__c":"Cardiovascular System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:1344","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Paralysis (complete loss of muscle function) in the arm, leg, and in some cases the face on one side of the body.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002301","HPO_Synonym__c":"Paralysis on one side of body","HPO_Name__c":"Hemiplegia","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:1344","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Progressive PR interval prolongation with the subsequent occurrence of a single nonconducted P wave that results in a pause. The pause that follows the nonconducted impulse is less than fully compensatory (less than the sum of two normal sinus intervals).","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0011707","HPO_Synonym__c":"Mobitz type 1 atrioventricular block; Wenckebach block","HPO_Name__c":"Mobitz I atrioventricular block","Feature_System__c":"Cardiovascular System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:1344","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"An acquired language impairment of some or all of the abilities to produce or comprehend speech and to read or write.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002381","HPO_Synonym__c":"Difficulty finding words; Losing words; Loss of words","HPO_Name__c":"Aphasia","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:1344","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Dysarthric speech is a general description referring to a neurological speech disorder characterized by poor articulation. Depending on the involved neurological structures, dysarthria may be further classified as spastic, flaccid, ataxic, hyperkinetic and hypokinetic, or mixed.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001260","HPO_Synonym__c":"Difficulty articulating speech; Dysarthric speech","HPO_Name__c":"Dysarthria","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:1344","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"The term dystrophy means abnormal growth. However, muscular dystrophy is used to describe primary myopathies with a genetic basis and a progressive course characterized by progressive skeletal muscle weakness and wasting, defects in muscle proteins, and histological features of muscle fiber degeneration (necrosis) and regeneration. If possible, it is preferred to use other HPO terms to describe the precise phenotypic abnormalities.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0003560","HPO_Name__c":"Muscular dystrophy","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:1344","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"Any structural anomaly of the heart.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001627","HPO_Synonym__c":"Abnormality of cardiac morphology; Abnormality of the heart; Abnormally shaped heart; Cardiac abnormality; Cardiac anomalies; Cardiac anomaly; Congenital heart defect; Congenital heart defects; Heart defect","HPO_Name__c":"Abnormal heart morphology","Feature_System__c":"Cardiovascular System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:1344","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"A flexion contracture is a bent (flexed) joint that cannot be straightened actively or passively. It is thus a chronic loss of joint motion due to structural changes in muscle, tendons, ligaments, or skin that prevents normal movement of joints.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001371","HPO_Synonym__c":"Flexed joint that cannot be straightened; Flexion contractures; Flexion contractures of joints","HPO_Name__c":"Flexion contracture","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}}],"tags":{"Cause":["Genetics"],"Disease Category":["Genetics"],"Specialist":["Genetics","Cardiology","Clinical Cardiac Electrophysiology"],"Account":["Cardiomyopathy"]},"synonyms":["atrial arrest"," atrial cardiomyopathy with heart block"," silent atrium"," sinus arrest"]}