![\"V6\"](\"https://www.googleapis.com/download/storage/v1/b/kaggle-forum-message-attachments/o/inbox%2F7917824%2F199e5d7f1f600c227132804b6dc6915e%2Fecg(5).png?generation=1761253956984799&alt=media\")
The V6 lead of ECG 2042290760 is labeled with voltages above 30 mV, far beyond what fits on a piece of paper:
\n
These high voltages cannot be predicted. How is this artefact to be interpreted?
\n![\"ecg\"](\"https://www.googleapis.com/download/storage/v1/b/kaggle-forum-message-attachments/o/inbox%2F7917824%2Ff1916a9720036efa6f8329c16e521e69%2F2042290760-0001.png?generation=1761253766901789&alt=media\")
The V6 lead of ECG 2042290760 is labeled with voltages above 30 mV, far beyond what fits on a piece of paper:
\n
These high voltages cannot be predicted. How is this artefact to be interpreted?
\n
Good question! The ECGs are real data collected in clinical settings. From time to time, ECG leads may be disconnected, or the device may fail or saturate in some channels. In these (rather rare) cases, the waveforms exceed the expected few-millivolts range and, when printed on paper or stored as an image, may extend beyond the page margins. There is no practical way to accurately recover them from the images alone. However, these cases are occasional and average out across the whole dataset. Since the data are the same for all teams, the situation is similar for everyone and will not impact your rankings. Of course, you may strategically decide what's best to return in these cases, as the challenge score will still compare your submitted entries with the ground-truth waveforms (your green plot). Another interesting scenario you may notice is when the leads run into one another due to high amplitudes or baseline wander. Looking forward to seeing the innovative solutions the teams come up with to address those cases.
", "rawMarkdown": "Good question! The ECGs are real data collected in clinical settings. From time to time, ECG leads may be disconnected, or the device may fail or saturate in some channels. In these (rather rare) cases, the waveforms exceed the expected few-millivolts range and, when printed on paper or stored as an image, may extend beyond the page margins. There is no practical way to accurately recover them from the images alone. However, these cases are occasional and average out across the whole dataset. Since the data are the same for all teams, the situation is similar for everyone and will not impact your rankings. Of course, you may strategically decide what's best to return in these cases, as the challenge score will still compare your submitted entries with the ground-truth waveforms (your green plot). Another interesting scenario you may notice is when the leads run into one another due to high amplitudes or baseline wander. Looking forward to seeing the innovative solutions the teams come up with to address those cases.", "votes": null }, { "id": "3306390", "postDate": "10/24/2025 13:13:11", "content": "A bit offtopic but I'd like to ask. Is the initial tower a reference for 1 unit amplitude?
", "rawMarkdown": "A bit offtopic but I'd like to ask. Is the initial tower a reference for 1 unit amplitude?", "votes": null }, { "id": "3306418", "postDate": "10/24/2025 14:03:47", "content": "If you're referring to the square pulse to the left of the ECG segments, it's the standard ECG calibration pulse with a 1 mV amplitude and a 0.2 s width. It's very common in ECG printouts. Some ECG machines print it only once, somewhere on the image; others might print it at the beginning of each row of signals.
", "rawMarkdown": "If you're referring to the square pulse to the left of the ECG segments, it's the standard ECG calibration pulse with a 1 mV amplitude and a 0.2 s width. It's very common in ECG printouts. Some ECG machines print it only once, somewhere on the image; others might print it at the beginning of each row of signals.", "votes": null }, { "id": "3306424", "postDate": "10/24/2025 14:11:40", "content": "Yes. That's almost what I've though, a reference for 1 unit amplitud (1 mV). I haven't though into the width.
", "rawMarkdown": "Yes. That's almost what I've though, a reference for 1 unit amplitud (1 mV). I haven't though into the width.", "votes": null } ], "comments": [ { "id": 3305990, "author_name": "r2241272", "author_url": "", "post_date": "10/23/2025 21:55:23", "content": "Good question! The ECGs are real data collected in clinical settings. From time to time, ECG leads may be disconnected, or the device may fail or saturate in some channels. In these (rather rare) cases, the waveforms exceed the expected few-millivolts range and, when printed on paper or stored as an image, may extend beyond the page margins. There is no practical way to accurately recover them from the images alone. However, these cases are occasional and average out across the whole dataset. Since the data are the same for all teams, the situation is similar for everyone and will not impact your rankings. Of course, you may strategically decide what's best to return in these cases, as the challenge score will still compare your submitted entries with the ground-truth waveforms (your green plot). Another interesting scenario you may notice is when the leads run into one another due to high amplitudes or baseline wander. Looking forward to seeing the innovative solutions the teams come up with to address those cases.
", "votes": null, "replies": [] }, { "id": 3306390, "author_name": "sacuscreed", "author_url": "", "post_date": "10/24/2025 13:13:11", "content": "A bit offtopic but I'd like to ask. Is the initial tower a reference for 1 unit amplitude?
", "votes": null, "replies": [ { "id": 3306418, "author_name": "r2241272", "author_url": "", "post_date": "10/24/2025 14:03:47", "content": "If you're referring to the square pulse to the left of the ECG segments, it's the standard ECG calibration pulse with a 1 mV amplitude and a 0.2 s width. It's very common in ECG printouts. Some ECG machines print it only once, somewhere on the image; others might print it at the beginning of each row of signals.
", "votes": null, "replies": [ { "id": 3306424, "author_name": "sacuscreed", "author_url": "", "post_date": "10/24/2025 14:11:40", "content": "Yes. That's almost what I've though, a reference for 1 unit amplitud (1 mV). I haven't though into the width.
", "votes": null, "replies": [] } ] } ] } ], "raw_markdown_by_id": { "3305981": "The V6 lead of ECG 2042290760 is labeled with voltages above 30 mV, far beyond what fits on a piece of paper:\n\n.png?generation=1761253956984799&alt=media)\n\nThese high voltages cannot be predicted. How is this artefact to be interpreted?\n\n", "3305990": "Good question! The ECGs are real data collected in clinical settings. From time to time, ECG leads may be disconnected, or the device may fail or saturate in some channels. In these (rather rare) cases, the waveforms exceed the expected few-millivolts range and, when printed on paper or stored as an image, may extend beyond the page margins. There is no practical way to accurately recover them from the images alone. However, these cases are occasional and average out across the whole dataset. Since the data are the same for all teams, the situation is similar for everyone and will not impact your rankings. Of course, you may strategically decide what's best to return in these cases, as the challenge score will still compare your submitted entries with the ground-truth waveforms (your green plot). Another interesting scenario you may notice is when the leads run into one another due to high amplitudes or baseline wander. Looking forward to seeing the innovative solutions the teams come up with to address those cases.", "3306390": "A bit offtopic but I'd like to ask. Is the initial tower a reference for 1 unit amplitude?", "3306418": "If you're referring to the square pulse to the left of the ECG segments, it's the standard ECG calibration pulse with a 1 mV amplitude and a 0.2 s width. It's very common in ECG printouts. Some ECG machines print it only once, somewhere on the image; others might print it at the beginning of each row of signals.", "3306424": "Yes. That's almost what I've though, a reference for 1 unit amplitud (1 mV). I haven't though into the width." }, "source": "meta" }