"pulseless electrical activity" meaning in English

{
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      "expansion": "pulseless electrical activity (uncountable)",
      "name": "en-noun"
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
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          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
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          "name": "Pathology",
          "orig": "en:Pathology",
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            "Biology",
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      ],
      "glosses": [
        "A medical condition in which the heart's electrical activity is present on an electrocardiogram but doesn't result in a pulse."
      ],
      "id": "en-pulseless_electrical_activity-en-noun-d6~Tjq16",
      "links": [
        [
          "pathology",
          "pathology"
        ],
        [
          "electrical",
          "electrical"
        ],
        [
          "electrocardiogram",
          "electrocardiogram"
        ],
        [
          "pulse",
          "pulse"
        ]
      ],
      "raw_glosses": [
        "(pathology) A medical condition in which the heart's electrical activity is present on an electrocardiogram but doesn't result in a pulse."
      ],
      "synonyms": [
        {
          "word": "PEA"
        }
      ],
      "tags": [
        "uncountable"
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      "topics": [
        "medicine",
        "pathology",
        "sciences"
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    }
  ],
  "word": "pulseless electrical activity"
}

{
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      "expansion": "pulseless electrical activity (uncountable)",
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
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        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
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      ],
      "glosses": [
        "A medical condition in which the heart's electrical activity is present on an electrocardiogram but doesn't result in a pulse."
      ],
      "links": [
        [
          "pathology",
          "pathology"
        ],
        [
          "electrical",
          "electrical"
        ],
        [
          "electrocardiogram",
          "electrocardiogram"
        ],
        [
          "pulse",
          "pulse"
        ]
      ],
      "raw_glosses": [
        "(pathology) A medical condition in which the heart's electrical activity is present on an electrocardiogram but doesn't result in a pulse."
      ],
      "tags": [
        "uncountable"
      ],
      "topics": [
        "medicine",
        "pathology",
        "sciences"
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  ],
  "synonyms": [
    {
      "word": "PEA"
    }
  ],
  "word": "pulseless electrical activity"
}