| Schedule of Debt Instruments and their Changes |
The following tables set forth a summary of the debt instruments and their changes during the three and nine months ended September 30, 2026 and 2025 (in thousands): | | | Convertible
Loans
Payable | | | Tasly
Convertible
Note -
Related
Party | | | Convertible
Promissory
Note -
Related
Party | | | Convertible
Senior
Notes | | | Promissory
Notes | | | PPP Loan | | | D&O
Insurance
Financing | | | Balance at January 1, 2026 | | $ | 7,877 | | | $ | 2,290 | | | $ | 1,870 | | | $ | 42 | | | $ | 1,049 | | | $ | 1,390 | | | $ | 297 | | | Debt repayments | | | (195 | ) | | | — | | | | — | | | | — | | | | (24 | ) | | | — | | | | (222 | ) | | Change in fair value | | | 555 | | | | 242 | | | | — | | | | — | | | | — | | | | — | | | | — | | | Conversion of debt to equity | | | (1,260 | ) | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | | | Debt forgiven | | | — | | | | — | | | | — | | | | — | | | | — | | | | (1,392 | ) | | | | | | Accrued stated interest | | | — | | | | — | | | | — | | | | 1 | | | | 15 | | | | 2 | | | | — | | | Balance at March 31, 2026; Current debt | | $ | 6,977 | | | $ | 2,532 | | | $ | 1,870 | | | $ | 43 | | | $ | 1,040 | | | $ | — | | | $ | 75 | | | Issuance of debt | | | 1,500 | | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | | | Debt repayments | | | (765 | ) | | | — | | | | — | | | | — | | | | — | | | | — | | | | (75 | ) | | Change in fair value | | | 3,910 | | | | 97 | | | | 244 | | | | — | | | | — | | | | — | | | | — | | | Conversion of debt to equity | | | (3,460 | ) | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | | | Debt forgiven | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | | | Accrued stated interest | | | — | | | | — | | | | — | | | | 2 | | | | 14 | | | | — | | | | — | | | Balance at June 30, 2026; Current debt | | $ | 8,162 | | | $ | 2,629 | | | $ | 2,114 | | | $ | 45 | | | $ | 1,054 | | | $ | — | | | $ | — | | | Issuance of debt | | | 1,300 | | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | | | Debt repayments | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | | | Change in fair value | | | (6,038 | ) | | | 98 | | | | (1,411 | ) | | | — | | | | — | | | | — | | | | — | | | Debt extinguishment | | | 6,407 | | | | — | | | | 1,479 | | | | (27 | ) | | | (413 | ) | | | — | | | | — | | | Conversion of debt to equity | | | (7,204 | ) | | | — | | | | (1,166 | ) | | | (18 | ) | | | (254 | ) | | | — | | | | — | | | Accrued stated interest | | | — | | | | — | | | | — | | | | — | | | | 12 | | | | — | | | | — | | | Balance at September 30, 2026; Current debt | | $ | 2,627 | | | $ | 2,727 | | | $ | 1,016 | | | $ | — | | | $ | 399 | | | $ | — | | | $ | — | | | Accounting basis | | | Fair value option | | | | Fair value option | | | | Fair value option | | | | Effective interest method | | | | Simple interest method | | | | Compounding Interest | | | | Simple interest method | | | Interest rate | | | 7% - 12% | | | | 24 | % | | | — | | | | 0%-12% | | | | 0%-12% | | | | 1 | % | | | 7 | % | | Conversion price(s) per share, as affected by the Reverse Stock Splits | | | various | | | $ | 14,400.00 | | | | Higher of $4.28 or prior-day closing price | | | | $3,750.00, $16,650.00, and $30,000.00 | | | | — | | | | — | | | | — | | | Maturity | | | various | | | | 3/31/2024 | | | | 12/31/2026 | | | | 7/11/2025 | | | | various | | | | — | | | | 7/10/2026 | | | | | Junior
Convertible
Notes | | | Convertible
Loans
Payable
(As Revised) | | | Tasly
Convertible
Note -
Related
Party | | | Convertible
Promissory
Note -
Related
Party | | | Convertible
Senior
Notes | | | Promissory
Notes | | | PPP Loan | | | Balance at January 1, 2025 | | $ | 18,419 | | | $ | — | | | $ | 2,234 | | | $ | — | | | $ | 25,268 | | | $ | 910 | | | $ | 1,376 | | | Issuance of debt | | | — | | | | — | | | | — | | | | — | | | | 750 | | | | — | | | | — | | | Change in fair value | | | — | | | | — | | | | 156 | | | | — | | | | — | | | | — | | | | — | | | Stated interest | | | 545 | | | | — | | | | — | | | | — | | | | 572 | | | | 15 | | | | 3 | | | Amortization of debt discount and issuance costs | | | 1 | | | | — | | | | — | | | | — | | | | (1 | ) | | | — | | | | — | | | Balance at March 31, 2025 | | $ | 18,965 | | | $ | — | | | $ | 2,390 | | | $ | — | | | $ | 26,589 | | | $ | 925 | | | $ | 1,379 | | | Issuance of debt | | | — | | | | — | | | | — | | | | — | | | | 700 | | | | — | | | | — | | | Change in fair value | | | — | | | | — | | | | (38 | ) | | | — | | | | — | | | | — | | | | — | | | Stated interest | | | 553 | | | | — | | | | 191 | | | | — | | | | 604 | | | | 15 | | | | 4 | | | Amortization of debt discount and issuance costs | | | 15 | | | | — | | | | — | | | | — | | | | 2 | | | | — | | | | — | | | Balance at June 30, 2025 | | $ | 19,533 | | | $ | — | | | $ | 2,543 | | | $ | — | | | $ | 27,895 | | | $ | 940 | | | $ | 1,383 | | | Issuance of debt | | | — | | | | 11,000 | | | | — | | | | — | | | | (100 | ) | | | 100 | | | | — | | | Debt repayments | | | — | | | | (610 | ) | | | — | | | | — | | | | (443 | ) | | | — | | | | — | | | Change in fair value | | | — | | | | 3,969 | | | | (145 | ) | | | (242 | ) | | | — | | | | — | | | | — | | | Conversion of debt to equity | | | (19,612 | ) | | | — | | | | — | | | | — | | | | (27,279 | ) | | | — | | | | — | | | Stated interest | | | 79 | | | | — | | | | (191 | ) | | | — | | | | 81 | | | | 5 | | | | 3 | | | Debt assumed in connection with reverse recapitalization | | | — | | | | — | | | | — | | | | 2,162 | | | | — | | | | — | | | | — | | | Balance at September 30, 2025 | | $ | — | | | $ | 14,359 | | | $ | 2,207 | | | $ | 1,920 | | | $ | 154 | | | $ | 1,045 | | | $ | 1,386 | |
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