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Related Party Transactions | 6 Months Ended | 12 Months Ended
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Jun. 30, 2025 | Dec. 31, 2024
Related Party Transactions [Line Items] |  |
Related Party Transactions | Note 10 — Related Party Transactions The Company issued convertible notes (also referred to as junior notes), Tasly convertible debt and promissory notes to certain shareholders. Refer to Note 5 for detail. | Note 10 — Related Party Transactions The Company issued convertible notes (also referred to as junior notes), Tasly convertible debt, and promissory notes to certain shareholders. Refer to Note 5 for detail.
NorthView Acquisition Corp [Member] |  |
Related Party Transactions [Line Items] |  |
Related Party Transactions | Note 5 — Related Party Transactions Founder Shares In April 2021, the Sponsor paid $25,000, or approximately $0.005 per share, to cover certain of the offering costs in exchange for an aggregate of 5,175,000 shares of common stock, par value $0.0001 per share (the “Founder Shares”). In October 2021, the Sponsor irrevocably surrendered to the Company for cancellation and for no consideration 862,500 shares of common stock. On December 20, 2021, the Company effected a 1.1- for-1 stock dividend of its common stock, resulting in the Sponsor holding an aggregate of 4,743,750 shares of common stock. The Founder Shares include an aggregate of up to 618,750 shares subject to forfeiture if the over-allotment option is not exercised by the underwriters in full. On December 22, 2021, the over-allotment option was fully exercised and such shares are no longer subject to forfeiture. The Sponsor has agreed not to transfer, assign or sell any of their Founder Shares until the earlier to occur of: (A) one year after the completion of the initial Business Combination or (B) the date on which the Company completes a liquidation, merger, stock exchange or other similar transaction after the initial Business Combination that results in all of the Company’s public stockholders having the right to exchange their shares of common stock for cash, securities or other property (the “Lock-up”). Notwithstanding the foregoing, if the last sale price of the Company’s common stock equals or exceeds $12.00 per share (as adjusted for stock splits, stock dividends, reorganizations, recapitalizations and the like) for any 20 trading days within any 30-trading day period commencing at least 150 days after the initial Business Combination, the Founder Shares will be released from the Lock-up. Convertible Promissory Note — Related Party On April 27, 2023, the Company signed a Convertible Working Capital Promissory Note (“the Note”) with the Sponsor for $1,200,000. The Note is non-interest bearing and is due the earlier of the consummation of a business combination or the date of liquidation. The Sponsor may elect to convert all or any portion of the unpaid principal balance of this Note into warrants, at a price of $1.00 per warrant. On January 10, 2024, the Company’s Board of Directors approved, and the Company amended the Note to increase the principal amount of the Note that could be drawn on to $1.5 million. The amended and restated Note also allows for the conversion of the outstanding principal balance of the Note to be repaid in shares of Company common stock at a price of $2.22 per share at the election of the sponsor. On May 31, 2024, the Company’s Board of Directors approved and the Company entered into a second amendment of its Convertible Working Capital Promissory Note with the sponsor to increase the principal amount of the Note that could be drawn on to $2.5 million. The second amended and restated Note also allows for the conversion of the outstanding principal balance of the Note to be repaid in shares of Company common stock at a price of $2.22 per share at the election of the sponsor. As of June 30, 2025 and December 31, 2024, the Company had principal outstanding of $1,919,796 and is presenting the Note at fair value on its balance sheet at June 30, 2025 and December 31, 2024 in the amount of $10,288,111 and $8,908,052, respectively. The Company has deferred the repayment of the Note to six months after the Closing. Securities Purchase Agreement On February 11, 2025, in a private transaction, the Company entered into a securities purchase agreement (the “SPA”) with an institutional investor (the “Investor”). Pursuant to the SPA, the Investor is expected, subject to the conditions relating to such purchase set forth in the SPA, to purchase from the Company’s senior secured convertible promissory notes (“Ascent Note”) in an aggregate principal amount of up to $22,222,222 for a purchase price of up to $20,000,000, after a 10% original issue discount (“OID”). As of June 30, 2025 and December 31, 2024, the Company is presenting the Ascent Note at fair value on its balance sheet at June 30, 2025 and December 31, 2024 in the amount of $193,878 and $0, respectively (See details on Note 6). As a result of the Business Combination, pursuant to the SPA, the Company issued a PIPE Convertible Note in the principal amount of $10,000,000 (the “Initial Note”) for a purchase price of $9,000,000, reflecting a 10% OID. The Initial Note matures on the date that is 18-months from the Closing and is convertible at any time at the Investor’s option at a conversion price equal to the lower of $10 or 95% of the lowest daily volume-weighted average price per share of the post-combination company common stock in the 10 trading days prior to the original issue date of the Initial Note and shall be adjusted, without limitation, based on down-round and most-favored nation (MFN) price and terms protections (the “Conversion Price”). Related Party Loans In order to finance transaction costs in connection with an intended initial Business Combination, the initial stockholders or an affiliate of the initial stockholders or certain of the Company’s officers and directors may, but are not obligated to, loan the Company funds as may be required (the “Working Capital Loans”). If the Company completes the initial Business Combination, the Company would repay such loaned amounts out of the proceeds of the Trust Account released to the Company. Otherwise, such loans would be repaid only out of funds held outside the Trust Account. Up to $1,500,000 of such loans may be convertible, at the option of the lender, into warrants at a price of $1.00 per warrant of the post Business Combination entity. The warrants would be identical to the Private Placement Warrants, including as to exercise price, exercisability and exercise period. At June 30, 2025 and December 31, 2024, the Company had no borrowings under the Working Capital Loans, other than the Note described in “Note 5 — Related Party Transactions — Convertible Promissory Note — Related Party”. Administrative Service Fee Commencing on the effective date of the IPO, the Company began paying its Sponsor a total of $5,000 per month for office space, utilities, secretarial support and other administrative and consulting services. As of June 30, 2023, the Company and the Sponsor terminated this agreement. For the three and six months ended June 30, 2025 and 2024, $0 had been incurred and billed relating to the administrative service fee, respectively. As of June 30, 2025 and December 31, 2024, $50,000 relating to the administrative service fee was not paid and recorded as due to related party. Advances from Profusa For the three and six months ended June 30, 2025 and 2024, Profusa agreed to advance funds to the Company to pay for operating expenses. As of June 30, 2025 and December 31, 2024, there was $1,299,040 and $791,407, respectively owed to Profusa, which is due upon demand or at the completion of the Business Combination. Due to Related Party As of June 30, 2025 and December 31, 2024, $50,000 relating to the administrative service fee was not paid and recorded as due to related party. On February 24, 2025, the Company paid costs on behalf of its Sponsor which reduced the balance due by $8,820. | Note 5 — Related Party Transactions Founder Shares In April 2021, the Sponsor paid $25,000, or approximately $0.005 per share, to cover certain of the offering costs in exchange for an aggregate of 5,175,000 shares of common stock, par value $0.0001 per share (the “Founder Shares”). In October 2021, the Sponsor irrevocably surrendered to the Company for cancellation and for no consideration 862,500 shares of common stock. On December 20, 2021, the Company effected a 1.1-for-1 stock dividend of its common stock, resulting in the Sponsor holding an aggregate of 4,743,750 shares of common stock. The Founder Shares include an aggregate of up to 618,750 shares subject to forfeiture if the over-allotment option is not exercised by the underwriters in full. On December 22, 2021, the over-allotment option was fully exercised and such shares are no longer subject to forfeiture. The Sponsor has agreed not to transfer, assign or sell any of their Founder Shares until the earlier to occur of: (A) one year after the completion of the initial Business Combination or (B) the date on which the Company completes a liquidation, merger, stock exchange or other similar transaction after the initial Business Combination that results in all of the Company’s public stockholders having the right to exchange their shares of common stock for cash, securities or other property (the “Lock-up”). Notwithstanding the foregoing, if the last sale price of the Company’s common stock equals or exceeds $12.00 per share (as adjusted for stock splits, stock dividends, reorganizations, recapitalizations and the like) for any 20 trading days within any 30-trading day period commencing at least 150 days after the initial Business Combination, the Founder Shares will be released from the Lock-up. Convertible Promissory Note — Related Party On April 27, 2023, the Company signed a Convertible Working Capital Promissory Note (“the Note”) with the Sponsor for $1,200,000. The Note is non-interest bearing and is due the earlier of the consummation of a business combination or the date of liquidation. The Sponsor may elect to convert all or any portion of the unpaid principal balance of this Note into warrants, at a price of $1.00 per warrant. On January 10, 2024, the Company’s Board of Directors approved, and the Company amended the Note to increase the principal amount of the Note that could be drawn on to $1.5 million. The amended and restated Note also allows for the conversion of the outstanding principal balance of the Note to be repaid in shares of Company common stock at a price of $2.22 per share at the election of the sponsor. On May 31, 2024, the Company’s Board of Directors approved and the Company entered into a second amendment of its Convertible Working Capital Promissory Note with the sponsor to increase the principal amount of the Note that could be drawn on to $2.5 million. The second amended and restated Note also allows for the conversion of the outstanding principal balance of the Note to be repaid in shares of Company common stock at a price of $2.22 per share at the election of the sponsor. As of December 31, 2024, the Company had principal outstanding of $1,919,796 and is presenting the Note at fair value on its balance sheet at December 31, 2024 in the amount of $8,908,052. Related Party Loans In order to finance transaction costs in connection with an intended initial Business Combination, the initial stockholders or an affiliate of the initial stockholders or certain of the Company’s officers and directors may, but are not obligated to, loan the Company funds as may be required (the “Working Capital Loans”). If the Company completes the initial Business Combination, the Company would repay such loaned amounts out of the proceeds of the Trust Account released to the Company. Otherwise, such loans would be repaid only out of funds held outside the Trust Account. In the event that the initial Business Combination does not close, the Company may use a portion of the working capital held outside the Trust Account to repay such loaned amounts but no proceeds from the Trust Account would be used to repay such loaned amounts. Up to $1,500,000 of such loans may be convertible, at the option of the lender, into warrants at a price of $1.00 per warrant of the post Business Combination entity. The warrants would be identical to the Private Placement Warrants, including as to exercise price, exercisability and exercise period. At December 31, 2024 and 2023, the Company had no borrowings under the Working Capital Loans, other than the Note described in “Note 5 — Related Party Transactions — Convertible Promissory Note — Related Party”. Administrative Service Fee Commencing on the effective date of the IPO, the Company began paying its Sponsor a total of $5,000 per month for office space, utilities, secretarial support and other administrative and consulting services. As of June 30, 2023, the Company and the Sponsor terminated this agreement. For the year ended December 31, 2024, $0 had been incurred and billed relating to the administrative service fee, respectively. For the year ended December 31, 2023, $30,000 had been incurred and billed relating to the administrative service fee. As of December 31, 2024 and 2023, $50,000 relating to the administrative service fee was not paid and recorded as due to related party. Advances from Profusa During the year ending December 31, 2024, Profusa agreed to advance funds to the Company to pay for operating expenses. As of December 31, 2024, there was $791,407 owed to Profusa, which is due upon demand or at the completion of the Business Combination.

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