इलेक्ट्रोकार्डियोग्राम, ईसीजी, दिल की धड़कन, आवृत्ति, पल्स, लहर, कंप्यूटर ग्राफिक्स, संकेत, साइन तरंग, अस्पताल, स्वास्थ्य
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