â¢ One plate is pushed beneath the other, or equivalent description. â¢ A trench may be formed at the subduction zone. (ii) Explain how subduction leads to volcanic activity. (2 points: 1 point for a correct explanation of one plate being pushed down and melted and 1. point for a correct explanation of molten material /magma rising to the surface near the zone)
Symptoms of atrial fibrillation occur when the upper chambers of the heart (atria) beat in a disorganized fashion. Atrial fibrillation is a type of arrhythmia. Characteristic symptoms include shortness of breath, palpitations, and lightheadedness.
These medical condition or symptom topics may be relevant to medical information for Hyperfibrinogenemia: 1  Level. 2  Fibrinogen. 3  Blood (1783 causes)  Blood symptoms (2297 1  causes) Blood disease.  Blood 1  disorder. 2  SYN. Fibrinogenemia.