NAVIGATION-BASED ECG RECORDING WITH A FEW ELECTRODES

1 . A portable device for measuring an electrocardiogram (ECG) of a user, comprising:

a first ECG sensor, wherein the first ECG sensor is configured to touch a body of the user;

a processor, the processor configured to:

receive a first ECG measurement at a first location on the body of the user, wherein the first ECG sensor is placed at the first location of the body;

identify a first region of the heart of the user based on the first location;

direct the user to move the portable device to a second location on the body of the user;

receive a second ECG measurement at the second location on the body; and

identify a second region of the heart of the user based on the second location.

2 . The portable device of claim 1 , further comprising:

a front side and a back side opposite to the front side, wherein the back side comprises the first ECG sensor.

3 . The portable device of claim 1 , further comprising:

a strap, wherein the strap is attachable to the portable device.

4 . The portable device of claim 3 , wherein the first ECG sensor is disposed in a buckle of the strap.

5 . The portable device of claim 4 ,

wherein the portable device is configured to be worn on a wrist of a first arm of the user,

wherein a tail of the strap comprises a second ECG sensor, and

wherein the second ECG sensor is configured so that the user holds the second ECG sensor between fingers of the second arm of the user.

6 . The portable device of claim 1 , wherein to direct the user to move the portable device to the second location on the body of the user comprises to:

notify the user that the portable device is at the second location.

7 . The portable device of claim 6 , wherein to notify the user that the portable device is at the second location comprises to:

compare intermediate locations of the portable device to predefined locations until the second location is identified.

8 . The portable device of claim 1 , further comprising:

a navigation sensor, wherein the navigation sensor is used to identify a location of the portable device on the body of the user.

9 . The portable device of claim 8 , wherein the navigation sensor is an accelerometer.

10 . The portable device of claim 8 , wherein the navigation sensor is an external device that is in communication with the portable device, the external device including a camera, and wherein the location of the portable device on the body of the user is determined using images taken by the camera.

11 . A method for measuring an electrocardiogram (ECG) of a user, comprising:

obtaining, using a portable device comprising a first ECG sensor, a first ECG measurement at a first location of a body of the user;

identifying a movement of the portable device on the body of the user;

identifying a second location of the body of the user based on the movement of the portable device; and

obtaining, using the portable device, a second ECG measurement at the second location of the body.

12 . The method of claim 11 , wherein identifying the movement of the portable device on the body of the user comprises:

obtaining, using a navigation sensor of the portable device, a displacement of the portable device from the first location to the second location.

13 . The method of claim 12 , wherein the navigation sensor is an accelerometer.

14 . The method of claim 12 , wherein the navigation sensor is an optoelectronic sensor.

15 . The method of claim 11 , wherein the first location and the second location are locations according to a scheme for obtaining ECG measurements.

16 . The method of claim 15 , wherein the scheme includes a set of points on a chest of the user.

17 . The method of claim 11 , wherein identifying the movement of the portable device on the body of the user comprises:

identifying previously stored locations and corresponding ECG measurements; and

identifying the second location of the body based on a comparison of the second ECG measurement to the corresponding ECG measurements.

18 . A system for measuring an electrocardiogram (ECG) of a user, comprising:

a portable device, comprising a first ECG sensor; and

an external device that is communication with the portable device, the portable device is configured to:

obtain a first ECG measurement at a first location of a body of the user;

identify the first location based on sensor information received from the external device;

prompt the user to move the portable device to a second location of the body of the user; and

obtain a second ECG measurement at the second location of the body.

19 . The system of claim 18 , wherein the external device is configured to:

obtain, using a camera of the external device, an image of the user holding the portable device to the body of the user; and

compare the image to stored images to identify the first location.

20 . The system of claim 19 , wherein to identify the first location based on the sensor information received from the external device comprises to:

receive, from the external device, the first location.