what is a ekg stress test

{"cid":"91218552","title":"Compatible GE Cam 14 Stress Test Cable 10\/14 Lead Diagnostic ECG Monitor Cable","imgUrl":"https:\/\/img.chinax.com\/nimg\/26\/bf\/c796faccf5aaa11f1b9b46e8c48b-200x200-1.jpg","attrs":{"Price":"15-35USD Per pcs","Brand Name":"Coyinmed","Model Number":"BKF10-06I","Minimum Order Quantity":"MOQ:2pcs","Certification":"ISO13485","Place of Origin":"China","Payment Terms":"L\/C,T\/T,Western Union","Supply Ability":"10000 pcs per month","Packaging Details":"1pcs per PE bag","Patient Size":"Adult\/Pediatric","Category":"EKG","Leads":"10 Lead","Standard":"IEC or AHA","Product Name":"Compatible for GE","Leadwires length":"102CM","Latex-free":"Yes","Lead Cable Material":"TPU","Sterile":"No","Warranty":"6 Months","Shelf Life":"24 Months"}}

{"cid":"91201969","title":"12 Lead Ecg Machine 1\/ 3\/ 6\/ 12 Channel Stress Test Ekg Electrocardiogram Machine","imgUrl":"https:\/\/img.chinax.com\/nimg\/8e\/4f\/128d0a12f6d3b9a954528292499d-200x200-1.jpg","attrs":{"Price":"$80.00 - $288.00","Brand Name":"Rainbow","Model Number":"ECG-8203\/8206","Minimum Order Quantity":"1 unit","Delivery Time":"within 3 days","Place of Origin":"China","Certification":"ce","Packaging Details":"Anti-collision film+ Carton box ;Package size: 32*25*17CM Gross weight :2.7kg","Payment Terms":"L\/C, T\/T, Western Union, MoneyGram","Supply Ability":"30000units\/year","Power":"AC\/DC","Battery":"Rechargeable","Weight":"Light","Material":"Metal, Plastic","Display":"7 inch LCD\/LED","Size":"26*20*6.5CM","Alarms":"Audible\/Visible","Analysis":"Real-time\/Offline"}}